662621623 has 12 divisors (see below), whose sum is σ = 681563664. Its totient is φ = 644192000.

The previous prime is 662621579. The next prime is 662621671. The reversal of 662621623 is 326126266.

It is not a de Polignac number, because 662621623 - 2²⁹ = 125750711 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (662621723) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 673590 + ... + 674572.

It is an arithmetic number, because the mean of its divisors is an integer number (56796972).

Almost surely, 2^662621623 is an apocalyptic number.

662621623 is a deficient number, since it is larger than the sum of its proper divisors (18942041).

662621623 is an equidigital number, since it uses as much as digits as its factorization.

662621623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1466 (or 1425 counting only the distinct ones).

The product of its digits is 31104, while the sum is 34.

The square root of 662621623 is about 25741.4378580529. The cubic root of 662621623 is about 871.8100436151.

Adding to 662621623 its reverse (326126266), we get a palindrome (988747889).

The spelling of 662621623 in words is "six hundred sixty-two million, six hundred twenty-one thousand, six hundred twenty-three".