66977084 has 6 divisors (see below), whose sum is σ = 117209904. Its totient is φ = 33488540.

The previous prime is 66977063. The next prime is 66977087. The reversal of 66977084 is 48077966.

It is a happy number.

It is a super-2 number, since 2×66977084² = 8971859562286112, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66977087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8372132 + ... + 8372139.

It is an arithmetic number, because the mean of its divisors is an integer number (19534984).

Almost surely, 2^66977084 is an apocalyptic number.

It is an amenable number.

66977084 is a deficient number, since it is larger than the sum of its proper divisors (50232820).

66977084 is a wasteful number, since it uses less digits than its factorization.

66977084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16744275 (or 16744273 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 47.

The square root of 66977084 is about 8183.9528346637. The cubic root of 66977084 is about 406.1084990746.

The spelling of 66977084 in words is "sixty-six million, nine hundred seventy-seven thousand, eighty-four".