66979317 has 8 divisors (see below), whose sum is σ = 89369280. Its totient is φ = 44621120.

The previous prime is 66979259. The next prime is 66979327. The reversal of 66979317 is 71397966.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66979317 - 2²³ = 58590709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66979327) by changing a digit.

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, 2484 + ... + 11837.

It is an arithmetic number, because the mean of its divisors is an integer number (11171160).

Almost surely, 2^66979317 is an apocalyptic number.

It is an amenable number.

66979317 is a deficient number, since it is larger than the sum of its proper divisors (22389963).

66979317 is a wasteful number, since it uses less digits than its factorization.

66979317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15883.

The product of its digits is 428652, while the sum is 48.

The square root of 66979317 is about 8184.0892590440. The cubic root of 66979317 is about 406.1130122112.

The spelling of 66979317 in words is "sixty-six million, nine hundred seventy-nine thousand, three hundred seventeen".