66879516 has 24 divisors (see below), whose sum is σ = 170239104. Its totient is φ = 20266480.

The previous prime is 66879503. The next prime is 66879521. The reversal of 66879516 is 61597866.

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, 253200 + ... + 253463.

It is an arithmetic number, because the mean of its divisors is an integer number (7093296).

Almost surely, 2^66879516 is an apocalyptic number.

66879516 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

66879516 is an abundant number, since it is smaller than the sum of its proper divisors (103359588).

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

66879516 is a wasteful number, since it uses less digits than its factorization.

66879516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506681 (or 506679 counting only the distinct ones).

The product of its digits is 544320, while the sum is 48.

The square root of 66879516 is about 8177.9897285335. The cubic root of 66879516 is about 405.9112054758.

The spelling of 66879516 in words is "sixty-six million, eight hundred seventy-nine thousand, five hundred sixteen".