66976684 has 24 divisors (see below), whose sum is σ = 120431808. Its totient is φ = 32580240.

The previous prime is 66976681. The next prime is 66976687. The reversal of 66976684 is 48667966.

It is an interprime number because it is at equal distance from previous prime (66976681) and next prime (66976687).

It is not an unprimeable number, because it can be changed into a prime (66976681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20739 + ... + 23749.

It is an arithmetic number, because the mean of its divisors is an integer number (5017992).

Almost surely, 2^66976684 is an apocalyptic number.

It is an amenable number.

66976684 is a deficient number, since it is larger than the sum of its proper divisors (53455124).

66976684 is a wasteful number, since it uses less digits than its factorization.

66976684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3165 (or 3163 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 52.

The square root of 66976684 is about 8183.9283965587. The cubic root of 66976684 is about 406.1076906203.

The spelling of 66976684 in words is "sixty-six million, nine hundred seventy-six thousand, six hundred eighty-four".