1056641663 has 16 divisors (see below), whose sum is σ = 1319950080. Its totient is φ = 821745600.

The previous prime is 1056641659. The next prime is 1056641683. The reversal of 1056641663 is 3661466501.

It is a cyclic number.

It is not a de Polignac number, because 1056641663 - 2² = 1056641659 is a prime.

It is a super-2 number, since 2×1056641663² = 2232983207974811138, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1056641633) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26948 + ... + 53286.

It is an arithmetic number, because the mean of its divisors is an integer number (82496880).

Almost surely, 2^1056641663 is an apocalyptic number.

1056641663 is a deficient number, since it is larger than the sum of its proper divisors (263308417).

1056641663 is a wasteful number, since it uses less digits than its factorization.

1056641663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26878.

The product of its (nonzero) digits is 77760, while the sum is 38.

The square root of 1056641663 is about 32506.0250261394. The cubic root of 1056641663 is about 1018.5348896922.

The spelling of 1056641663 in words is "one billion, fifty-six million, six hundred forty-one thousand, six hundred sixty-three".