66324667 has 8 divisors (see below), whose sum is σ = 70405200. Its totient is φ = 62264064.

The previous prime is 66324613. The next prime is 66324697. The reversal of 66324667 is 76642366.

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

It is not a de Polignac number, because 66324667 - 2¹⁵ = 66291899 is a prime.

It is a super-2 number, since 2×66324667² = 8797922905321778, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66324697) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2184 + ... + 11722.

It is an arithmetic number, because the mean of its divisors is an integer number (8800650).

Almost surely, 2^66324667 is an apocalyptic number.

66324667 is a deficient number, since it is larger than the sum of its proper divisors (4080533).

66324667 is a wasteful number, since it uses less digits than its factorization.

66324667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9965.

The product of its digits is 217728, while the sum is 40.

The square root of 66324667 is about 8143.9957637514. The cubic root of 66324667 is about 404.7855736337.

The spelling of 66324667 in words is "sixty-six million, three hundred twenty-four thousand, six hundred sixty-seven".