66776344 has 16 divisors (see below), whose sum is σ = 126613800. Its totient is φ = 33012672.

The previous prime is 66776329. The next prime is 66776399. The reversal of 66776344 is 44367766.

It is a self number, because there is not a number n which added to its sum of digits gives 66776344.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46182 + ... + 47605.

Almost surely, 2^66776344 is an apocalyptic number.

It is an amenable number.

66776344 is a deficient number, since it is larger than the sum of its proper divisors (59837456).

66776344 is a wasteful number, since it uses less digits than its factorization.

66776344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93882 (or 93878 counting only the distinct ones).

The product of its digits is 508032, while the sum is 43.

The square root of 66776344 is about 8171.6793867601. The cubic root of 66776344 is about 405.7023711089.

The spelling of 66776344 in words is "sixty-six million, seven hundred seventy-six thousand, three hundred forty-four".