665152207 has 4 divisors (see below), whose sum is σ = 688088520. Its totient is φ = 642215896.

The previous prime is 665152199. The next prime is 665152273. The reversal of 665152207 is 702251566.

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 665152207 - 2³ = 665152199 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 (665152297) 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, 11468113 + ... + 11468170.

It is an arithmetic number, because the mean of its divisors is an integer number (172022130).

Almost surely, 2^665152207 is an apocalyptic number.

665152207 is a deficient number, since it is larger than the sum of its proper divisors (22936313).

665152207 is a wasteful number, since it uses less digits than its factorization.

665152207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22936312.

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 665152207 is about 25790.5449147551. The cubic root of 665152207 is about 872.9184620050.

The spelling of 665152207 in words is "six hundred sixty-five million, one hundred fifty-two thousand, two hundred seven".