56766666 has 24 divisors (see below), whose sum is σ = 124794432. Its totient is φ = 17201800.

The previous prime is 56766649. The next prime is 56766667. The reversal of 56766666 is 66666765.

56766666 is a modest number, since divided by 6666 gives 5676 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56766667) 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 11 ways as a sum of consecutive naturals, for example, 38370 + ... + 39821.

It is an arithmetic number, because the mean of its divisors is an integer number (5199768).

Almost surely, 2^56766666 is an apocalyptic number.

56766666 is an abundant number, since it is smaller than the sum of its proper divisors (68027766).

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

56766666 is a wasteful number, since it uses less digits than its factorization.

56766666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78218 (or 78207 counting only the distinct ones).

The product of its digits is 1632960, while the sum is 48.

The square root of 56766666 is about 7534.3656667300. The cubic root of 56766666 is about 384.3242568218.

Subtracting 56766666 from its reverse (66666765), we obtain a palindrome (9900099).

The spelling of 56766666 in words is "fifty-six million, seven hundred sixty-six thousand, six hundred sixty-six".