66976734 has 32 divisors (see below), whose sum is σ = 150086016. Its totient is φ = 19746720.

The previous prime is 66976717. The next prime is 66976769. The reversal of 66976734 is 43767966.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11272 + ... + 16155.

It is an arithmetic number, because the mean of its divisors is an integer number (4690188).

Almost surely, 2^66976734 is an apocalyptic number.

66976734 is an abundant number, since it is smaller than the sum of its proper divisors (83109282).

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

66976734 is a wasteful number, since it uses less digits than its factorization.

66976734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27480.

The product of its digits is 1143072, while the sum is 48.

The square root of 66976734 is about 8183.9314513258. The cubic root of 66976734 is about 406.1077916773.

It can be divided in two parts, 6697 and 6734, that added together give a palindrome (13431).

The spelling of 66976734 in words is "sixty-six million, nine hundred seventy-six thousand, seven hundred thirty-four".