56661045 has 16 divisors (see below), whose sum is σ = 103608960. Its totient is φ = 25902144.

The previous prime is 56661043. The next prime is 56661061. The reversal of 56661045 is 54016665.

It is not a de Polignac number, because 56661045 - 2¹ = 56661043 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 56660997 and 56661015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56661043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 269710 + ... + 269919.

It is an arithmetic number, because the mean of its divisors is an integer number (6475560).

Almost surely, 2^56661045 is an apocalyptic number.

It is an amenable number.

56661045 is a deficient number, since it is larger than the sum of its proper divisors (46947915).

56661045 is a wasteful number, since it uses less digits than its factorization.

56661045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539644.

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 56661045 is about 7527.3531204534. The cubic root of 56661045 is about 384.0857488084.

The spelling of 56661045 in words is "fifty-six million, six hundred sixty-one thousand, forty-five".