664600667 has 8 divisors (see below), whose sum is σ = 668547072. Its totient is φ = 660666600.

The previous prime is 664600637. The next prime is 664600751. The reversal of 664600667 is 766006466.

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

It is a cyclic number.

It is not a de Polignac number, because 664600667 - 2¹² = 664596571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (664600637) 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, 118742 + ... + 124212.

It is an arithmetic number, because the mean of its divisors is an integer number (83568384).

Almost surely, 2^664600667 is an apocalyptic number.

664600667 is a deficient number, since it is larger than the sum of its proper divisors (3946405).

664600667 is a wasteful number, since it uses less digits than its factorization.

664600667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6169.

The product of its (nonzero) digits is 217728, while the sum is 41.

The square root of 664600667 is about 25779.8500189586. The cubic root of 664600667 is about 872.6771224658.

The spelling of 664600667 in words is "six hundred sixty-four million, six hundred thousand, six hundred sixty-seven".