664146567 has 64 divisors (see below), whose sum is σ = 1167851520. Its totient is φ = 365148000.

The previous prime is 664146563. The next prime is 664146607. The reversal of 664146567 is 765641466.

664146567 is a `hidden beast` number, since 6 + 6 + 41 + 46 + 567 = 666.

It is not a de Polignac number, because 664146567 - 2² = 664146563 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664146563) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 576442 + ... + 577592.

It is an arithmetic number, because the mean of its divisors is an integer number (18247680).

Almost surely, 2^664146567 is an apocalyptic number.

664146567 is a deficient number, since it is larger than the sum of its proper divisors (503704953).

664146567 is a wasteful number, since it uses less digits than its factorization.

664146567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1281 (or 1275 counting only the distinct ones).

The product of its digits is 725760, while the sum is 45.

The square root of 664146567 is about 25771.0412478813. The cubic root of 664146567 is about 872.4783198911.

The spelling of 664146567 in words is "six hundred sixty-four million, one hundred forty-six thousand, five hundred sixty-seven".