1056766665 has 32 divisors (see below), whose sum is σ = 1792492416. Its totient is φ = 529802240.

The previous prime is 1056766649. The next prime is 1056766673. The reversal of 1056766665 is 5666676501.

It is a happy number.

It is not a de Polignac number, because 1056766665 - 2⁴ = 1056766649 is a prime.

It is a super-2 number, since 2×1056766665² = 2233511568510444450, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 256270 + ... + 260360.

It is an arithmetic number, because the mean of its divisors is an integer number (56015388).

Almost surely, 2^1056766665 is an apocalyptic number.

1056766665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1056766665 is a deficient number, since it is larger than the sum of its proper divisors (735725751).

1056766665 is a wasteful number, since it uses less digits than its factorization.

1056766665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5129.

The product of its (nonzero) digits is 1360800, while the sum is 48.

The square root of 1056766665 is about 32507.9477205191. The cubic root of 1056766665 is about 1018.5750527492.

The spelling of 1056766665 in words is "one billion, fifty-six million, seven hundred sixty-six thousand, six hundred sixty-five".