66130928 has 10 divisors (see below), whose sum is σ = 128128704. Its totient is φ = 33065456.

The previous prime is 66130907. The next prime is 66130937. The reversal of 66130928 is 82903166.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2066576 + ... + 2066607.

Almost surely, 2^66130928 is an apocalyptic number.

It is an amenable number.

66130928 is a deficient number, since it is larger than the sum of its proper divisors (61997776).

66130928 is a wasteful number, since it uses less digits than its factorization.

66130928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4133191 (or 4133185 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 66130928 is about 8132.0924736503. The cubic root of 66130928 is about 404.3910535684.

The spelling of 66130928 in words is "sixty-six million, one hundred thirty thousand, nine hundred twenty-eight".