66313951 has 8 divisors (see below), whose sum is σ = 72748800. Its totient is φ = 59946840.

The previous prime is 66313927. The next prime is 66313963. The reversal of 66313951 is 15931366.

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 66313951 - 2⁷ = 66313823 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 (66313901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14871 + ... + 18808.

It is an arithmetic number, because the mean of its divisors is an integer number (9093600).

Almost surely, 2^66313951 is an apocalyptic number.

66313951 is a deficient number, since it is larger than the sum of its proper divisors (6434849).

66313951 is a wasteful number, since it uses less digits than its factorization.

66313951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33869.

The product of its digits is 14580, while the sum is 34.

The square root of 66313951 is about 8143.3378291705. The cubic root of 66313951 is about 404.7637722133.

The spelling of 66313951 in words is "sixty-six million, three hundred thirteen thousand, nine hundred fifty-one".