66772884 has 24 divisors (see below), whose sum is σ = 160830208. Its totient is φ = 21539520.

The previous prime is 66772861. The next prime is 66772921. The reversal of 66772884 is 48827766.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89377 + ... + 90120.

Almost surely, 2^66772884 is an apocalyptic number.

It is an amenable number.

66772884 is an abundant number, since it is smaller than the sum of its proper divisors (94057324).

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

66772884 is a wasteful number, since it uses less digits than its factorization.

66772884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179535 (or 179533 counting only the distinct ones).

The product of its digits is 903168, while the sum is 48.

The square root of 66772884 is about 8171.4676772291. The cubic root of 66772884 is about 405.6953638647.

The spelling of 66772884 in words is "sixty-six million, seven hundred seventy-two thousand, eight hundred eighty-four".