66464751 has 8 divisors (see below), whose sum is σ = 88672000. Its totient is φ = 44283672.

The previous prime is 66464701. The next prime is 66464759. The reversal of 66464751 is 15746466.

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

It is not a de Polignac number, because 66464751 - 2⁷ = 66464623 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 (66464759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 456 + ... + 11538.

It is an arithmetic number, because the mean of its divisors is an integer number (11084000).

Almost surely, 2^66464751 is an apocalyptic number.

66464751 is a deficient number, since it is larger than the sum of its proper divisors (22207249).

66464751 is a wasteful number, since it uses less digits than its factorization.

66464751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13085.

The product of its digits is 120960, while the sum is 39.

The square root of 66464751 is about 8152.5916738176. The cubic root of 66464751 is about 405.0703550995.

The spelling of 66464751 in words is "sixty-six million, four hundred sixty-four thousand, seven hundred fifty-one".