652665407 has 4 divisors (see below), whose sum is σ = 652915920. Its totient is φ = 652414896.

The previous prime is 652665401. The next prime is 652665421. The reversal of 652665407 is 704566256.

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

It is a cyclic number.

It is not a de Polignac number, because 652665407 - 2⁸ = 652665151 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 (652665401) 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, 121307 + ... + 126572.

It is an arithmetic number, because the mean of its divisors is an integer number (163228980).

Almost surely, 2^652665407 is an apocalyptic number.

652665407 is a deficient number, since it is larger than the sum of its proper divisors (250513).

652665407 is a wasteful number, since it uses less digits than its factorization.

652665407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250512.

The product of its (nonzero) digits is 302400, while the sum is 41.

The square root of 652665407 is about 25547.3170215583. The cubic root of 652665407 is about 867.4215314918.

The spelling of 652665407 in words is "six hundred fifty-two million, six hundred sixty-five thousand, four hundred seven".