1065661604 has 36 divisors (see below), whose sum is σ = 2219850864. Its totient is φ = 446087376.

The previous prime is 1065661577. The next prime is 1065661613. The reversal of 1065661604 is 4061665601.

1065661604 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×1065661604² = 2271269308479705632, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54794 + ... + 71649.

It is an arithmetic number, because the mean of its divisors is an integer number (61662524).

Almost surely, 2^1065661604 is an apocalyptic number.

1065661604 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1065661604 is an abundant number, since it is smaller than the sum of its proper divisors (1154189260).

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

1065661604 is a wasteful number, since it uses less digits than its factorization.

1065661604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126504 (or 126495 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 1065661604 is about 32644.4727940275. The cubic root of 1065661604 is about 1021.4248969285.

The spelling of 1065661604 in words is "one billion, sixty-five million, six hundred sixty-one thousand, six hundred four".