667627623 has 32 divisors (see below), whose sum is σ = 1076196800. Its totient is φ = 406591488.

The previous prime is 667627607. The next prime is 667627637. The reversal of 667627623 is 326726766.

It is a Cunningham number, because it is equal to 874³-1.

It is not a de Polignac number, because 667627623 - 2⁴ = 667627607 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 (667627663) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24243 + ... + 43851.

It is an arithmetic number, because the mean of its divisors is an integer number (33631150).

Almost surely, 2^667627623 is an apocalyptic number.

667627623 is a deficient number, since it is larger than the sum of its proper divisors (408569177).

667627623 is a wasteful number, since it uses less digits than its factorization.

667627623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19728 (or 19722 counting only the distinct ones).

The product of its digits is 762048, while the sum is 45.

The square root of 667627623 is about 25838.4911130662. The cubic root of 667627623 is about 873.9999995636. Note that the first 6 decimals are identical.

The spelling of 667627623 in words is "six hundred sixty-seven million, six hundred twenty-seven thousand, six hundred twenty-three".