66700957 has 8 divisors (see below), whose sum is σ = 69501600. Its totient is φ = 63933744.

The previous prime is 66700951. The next prime is 66700987. The reversal of 66700957 is 75900766.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66700957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66700951) 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, 4243 + ... + 12304.

It is an arithmetic number, because the mean of its divisors is an integer number (8687700).

Almost surely, 2^66700957 is an apocalyptic number.

It is an amenable number.

66700957 is a deficient number, since it is larger than the sum of its proper divisors (2800643).

66700957 is a wasteful number, since it uses less digits than its factorization.

66700957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16715.

The product of its (nonzero) digits is 79380, while the sum is 40.

The square root of 66700957 is about 8167.0653848246. The cubic root of 66700957 is about 405.5496413669.

The spelling of 66700957 in words is "sixty-six million, seven hundred thousand, nine hundred fifty-seven".