66062664 has 48 divisors (see below), whose sum is σ = 181385100. Its totient is φ = 21717504.

The previous prime is 66062657. The next prime is 66062687. The reversal of 66062664 is 46626066.

It can be written as a sum of positive squares in 2 ways, for example, as 56881764 + 9180900 = 7542^2 + 3030^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1029 + ... + 11540.

Almost surely, 2^66062664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66062664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90692550).

66062664 is an abundant number, since it is smaller than the sum of its proper divisors (115322436).

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

66062664 is a wasteful number, since it uses less digits than its factorization.

66062664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12654 (or 12647 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

The square root of 66062664 is about 8127.8941922247. The cubic root of 66062664 is about 404.2518607290.

The spelling of 66062664 in words is "sixty-six million, sixty-two thousand, six hundred sixty-four".