56091866 has 16 divisors (see below), whose sum is σ = 86486400. Its totient is φ = 27269088.

The previous prime is 56091863. The next prime is 56091869. The reversal of 56091866 is 66819065.

It is an interprime number because it is at equal distance from previous prime (56091863) and next prime (56091869).

It is not an unprimeable number, because it can be changed into a prime (56091863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19190 + ... + 21918.

It is an arithmetic number, because the mean of its divisors is an integer number (5405400).

Almost surely, 2^56091866 is an apocalyptic number.

56091866 is a deficient number, since it is larger than the sum of its proper divisors (30394534).

56091866 is a wasteful number, since it uses less digits than its factorization.

56091866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3013.

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 56091866 is about 7489.4503136078. The cubic root of 56091866 is about 382.7953286125.

The spelling of 56091866 in words is "fifty-six million, ninety-one thousand, eight hundred sixty-six".