1066658336640 has 1536 divisors, whose sum is σ = 4325479401600. Its totient is φ = 249926860800.

The previous prime is 1066658336587. The next prime is 1066658336677. The reversal of 1066658336640 is 466338566601.

It is a super-2 number, since 2×1066658336640² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 17486202210 + ... + 17486202270.

Almost surely, 2^{1066658336640} is an apocalyptic number.

1066658336640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1066658336640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2162739700800).

1066658336640 is an abundant number, since it is smaller than the sum of its proper divisors (3258821064960).

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

1066658336640 is an frugal number, since it uses more digits than its factorization.

1066658336640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176 (or 115 counting only the distinct ones).

The product of its (nonzero) digits is 11197440, while the sum is 54.

The spelling of 1066658336640 in words is "one trillion, sixty-six billion, six hundred fifty-eight million, three hundred thirty-six thousand, six hundred forty".