56663091 has 16 divisors (see below), whose sum is σ = 88884000. Its totient is φ = 35553024.

The previous prime is 56663051. The next prime is 56663093. The reversal of 56663091 is 19036665.

It is not a de Polignac number, because 56663091 - 2¹¹ = 56661043 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56663093) 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, 61266 + ... + 62183.

It is an arithmetic number, because the mean of its divisors is an integer number (5555250).

Almost surely, 2^56663091 is an apocalyptic number.

56663091 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

56663091 is a deficient number, since it is larger than the sum of its proper divisors (32220909).

56663091 is a wasteful number, since it uses less digits than its factorization.

56663091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123475 (or 123469 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 36.

The square root of 56663091 is about 7527.4890235722. The cubic root of 56663091 is about 384.0903717963.

The spelling of 56663091 in words is "fifty-six million, six hundred sixty-three thousand, ninety-one".