1066556637846 has 128 divisors (see below), whose sum is σ = 2748410864640. Its totient is φ = 300272603904.

The previous prime is 1066556637841. The next prime is 1066556637851. The reversal of 1066556637846 is 6487366556601.

1066556637846 is a `hidden beast` number, since 1 + 0 + 6 + 6 + 556 + 6 + 3 + 78 + 4 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (1066556637841) and next prime (1066556637851).

It is a super-2 number, since 2×1066556637846² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1066556637841) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 30142561 + ... + 30177923.

It is an arithmetic number, because the mean of its divisors is an integer number (21471959880).

Almost surely, 2^{1066556637846} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1066556637846, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1374205432320).

1066556637846 is an abundant number, since it is smaller than the sum of its proper divisors (1681854226794).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1066556637846 is a wasteful number, since it uses less digits than its factorization.

1066556637846 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36547 (or 36541 counting only the distinct ones).

The product of its (nonzero) digits is 130636800, while the sum is 63.

The spelling of 1066556637846 in words is "one trillion, sixty-six billion, five hundred fifty-six million, six hundred thirty-seven thousand, eight hundred forty-six".