56661679 has 8 divisors (see below), whose sum is σ = 58731120. Its totient is φ = 54600000.

The previous prime is 56661643. The next prime is 56661691. The reversal of 56661679 is 97616665.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 56661679 - 2²¹ = 54564527 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56661079) 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, 15804 + ... + 19054.

It is an arithmetic number, because the mean of its divisors is an integer number (7341390).

Almost surely, 2^56661679 is an apocalyptic number.

56661679 is a deficient number, since it is larger than the sum of its proper divisors (2069441).

56661679 is a wasteful number, since it uses less digits than its factorization.

56661679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3881.

The product of its digits is 408240, while the sum is 46.

The square root of 56661679 is about 7527.3952334124. The cubic root of 56661679 is about 384.0871813591.

The spelling of 56661679 in words is "fifty-six million, six hundred sixty-one thousand, six hundred seventy-nine".