66467664 has 30 divisors (see below), whose sum is σ = 186017546. Its totient is φ = 22155840.

The previous prime is 66467657. The next prime is 66467669. The reversal of 66467664 is 46676466.

It can be written as a sum of positive squares in only one way, i.e., 37307664 + 29160000 = 6108^2 + 5400^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66467669) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 230647 + ... + 230934.

Almost surely, 2^66467664 is an apocalyptic number.

It is an amenable number.

66467664 is an abundant number, since it is smaller than the sum of its proper divisors (119549882).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66467664 is a wasteful number, since it uses less digits than its factorization.

66467664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461595 (or 461586 counting only the distinct ones).

The product of its digits is 870912, while the sum is 45.

The square root of 66467664 is about 8152.7703267049. The cubic root of 66467664 is about 405.0762727862.

The spelling of 66467664 in words is "sixty-six million, four hundred sixty-seven thousand, six hundred sixty-four".