625531667 has 4 divisors (see below), whose sum is σ = 652728720. Its totient is φ = 598334616.

The previous prime is 625531639. The next prime is 625531679. The reversal of 625531667 is 766135526.

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 625531667 - 2¹⁰ = 625530643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (625531967) 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, 13598492 + ... + 13598537.

It is an arithmetic number, because the mean of its divisors is an integer number (163182180).

Almost surely, 2^625531667 is an apocalyptic number.

625531667 is a deficient number, since it is larger than the sum of its proper divisors (27197053).

625531667 is a wasteful number, since it uses less digits than its factorization.

625531667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27197052.

The product of its digits is 226800, while the sum is 41.

The square root of 625531667 is about 25010.6310796029. The cubic root of 625531667 is about 855.2303413683.

The spelling of 625531667 in words is "six hundred twenty-five million, five hundred thirty-one thousand, six hundred sixty-seven".