66664332 has 72 divisors (see below), whose sum is σ = 194195456. Its totient is φ = 18887904.

The previous prime is 66664321. The next prime is 66664349. The reversal of 66664332 is 23346666.

It is a super-2 number, since 2×66664332² = 8888266322012448, which contains 22 as substring.

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

It is a nude number because it is divisible by every one of its digits.

It is a nialpdrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30963 + ... + 33045.

Almost surely, 2^66664332 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 66664332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97097728).

66664332 is an abundant number, since it is smaller than the sum of its proper divisors (127531124).

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

66664332 is a wasteful number, since it uses less digits than its factorization.

66664332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2227 (or 2222 counting only the distinct ones).

The product of its digits is 93312, while the sum is 36.

The square root of 66664332 is about 8164.8228394742. The cubic root of 66664332 is about 405.4753996782.

The spelling of 66664332 in words is "sixty-six million, six hundred sixty-four thousand, three hundred thirty-two".