1066655240 has 128 divisors (see below), whose sum is σ = 2839968000. Its totient is φ = 352926720.

The previous prime is 1066655197. The next prime is 1066655267. The reversal of 1066655240 is 425566601.

It is a super-2 number, since 2×1066655240² = 2275506802038915200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 1066655240.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1543295 + ... + 1543985.

It is an arithmetic number, because the mean of its divisors is an integer number (22187250).

Almost surely, 2^1066655240 is an apocalyptic number.

1066655240 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 1066655240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1419984000).

1066655240 is an abundant number, since it is smaller than the sum of its proper divisors (1773312760).

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

1066655240 is a wasteful number, since it uses less digits than its factorization.

1066655240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 895 (or 891 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 1066655240 is about 32659.6883022481. The cubic root of 1066655240 is about 1021.7422613607.

The spelling of 1066655240 in words is "one billion, sixty-six million, six hundred fifty-five thousand, two hundred forty".