664567607 has 4 divisors (see below), whose sum is σ = 724982856. Its totient is φ = 604152360.

The previous prime is 664567601. The next prime is 664567613. The reversal of 664567607 is 706765466.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (664567601) and next prime (664567613).

It is a cyclic number.

It is not a de Polignac number, because 664567607 - 2⁴ = 664567591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664567601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30207608 + ... + 30207629.

It is an arithmetic number, because the mean of its divisors is an integer number (181245714).

Almost surely, 2^664567607 is an apocalyptic number.

664567607 is a deficient number, since it is larger than the sum of its proper divisors (60415249).

664567607 is a wasteful number, since it uses less digits than its factorization.

664567607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60415248.

The product of its (nonzero) digits is 1270080, while the sum is 47.

The square root of 664567607 is about 25779.2088125295. The cubic root of 664567607 is about 872.6626520299.

The spelling of 664567607 in words is "six hundred sixty-four million, five hundred sixty-seven thousand, six hundred seven".