66463764 has 12 divisors (see below), whose sum is σ = 155082144. Its totient is φ = 22154584.

The previous prime is 66463763. The next prime is 66463777. The reversal of 66463764 is 46736466.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66463763) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2769312 + ... + 2769335.

It is an arithmetic number, because the mean of its divisors is an integer number (12923512).

Almost surely, 2^66463764 is an apocalyptic number.

It is an amenable number.

66463764 is an abundant number, since it is smaller than the sum of its proper divisors (88618380).

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

66463764 is a wasteful number, since it uses less digits than its factorization.

66463764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5538654 (or 5538652 counting only the distinct ones).

The product of its digits is 435456, while the sum is 42.

The square root of 66463764 is about 8152.5311406949. The cubic root of 66463764 is about 405.0683499945.

The spelling of 66463764 in words is "sixty-six million, four hundred sixty-three thousand, seven hundred sixty-four".