66676990 has 16 divisors (see below), whose sum is σ = 120111840. Its totient is φ = 26650080.

The previous prime is 66676979. The next prime is 66677011. The reversal of 66676990 is 9967666.

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, 22495 + ... + 25285.

It is an arithmetic number, because the mean of its divisors is an integer number (7506990).

Almost surely, 2^66676990 is an apocalyptic number.

66676990 is a deficient number, since it is larger than the sum of its proper divisors (53434850).

66676990 is a wasteful number, since it uses less digits than its factorization.

66676990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5187.

The product of its (nonzero) digits is 734832, while the sum is 49.

The square root of 66676990 is about 8165.5979572840. The cubic root of 66676990 is about 405.5010614909.

The spelling of 66676990 in words is "sixty-six million, six hundred seventy-six thousand, nine hundred ninety".