56689660 has 12 divisors (see below), whose sum is σ = 119048328. Its totient is φ = 22675856.

The previous prime is 56689657. The next prime is 56689667. The reversal of 56689660 is 6698665.

56689660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 56689660.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56689667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1417222 + ... + 1417261.

It is an arithmetic number, because the mean of its divisors is an integer number (9920694).

Almost surely, 2^56689660 is an apocalyptic number.

It is an amenable number.

56689660 is an abundant number, since it is smaller than the sum of its proper divisors (62358668).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

56689660 is a wasteful number, since it uses less digits than its factorization.

56689660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2834492 (or 2834490 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 46.

The square root of 56689660 is about 7529.2536150670. The cubic root of 56689660 is about 384.1503950103.

It can be divided in two parts, 5668 and 9660, that multiplied together give a triangular number (54752880 = T₁₀₄₆₄).

The spelling of 56689660 in words is "fifty-six million, six hundred eighty-nine thousand, six hundred sixty".