66574986 has 16 divisors (see below), whose sum is σ = 134167968. Its totient is φ = 22022000.

The previous prime is 66574961. The next prime is 66574999. The reversal of 66574986 is 68947566.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41565 + ... + 43136.

It is an arithmetic number, because the mean of its divisors is an integer number (8385498).

Almost surely, 2^66574986 is an apocalyptic number.

66574986 is an abundant number, since it is smaller than the sum of its proper divisors (67592982).

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

66574986 is a wasteful number, since it uses less digits than its factorization.

66574986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84837.

The product of its digits is 2177280, while the sum is 51.

The square root of 66574986 is about 8159.3496064331. The cubic root of 66574986 is about 405.2941743235.

The spelling of 66574986 in words is "sixty-six million, five hundred seventy-four thousand, nine hundred eighty-six".