66131976 has 16 divisors (see below), whose sum is σ = 165330000. Its totient is φ = 22043984.

The previous prime is 66131957. The next prime is 66131983. The reversal of 66131976 is 67913166.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1377726 + ... + 1377773.

It is an arithmetic number, because the mean of its divisors is an integer number (10333125).

Almost surely, 2^66131976 is an apocalyptic number.

It is an amenable number.

66131976 is an abundant number, since it is smaller than the sum of its proper divisors (99198024).

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

66131976 is a wasteful number, since it uses less digits than its factorization.

66131976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2755508 (or 2755504 counting only the distinct ones).

The product of its digits is 40824, while the sum is 39.

The square root of 66131976 is about 8132.1569094552. The cubic root of 66131976 is about 404.3931897327.

The spelling of 66131976 in words is "sixty-six million, one hundred thirty-one thousand, nine hundred seventy-six".