663625426 has 32 divisors (see below), whose sum is σ = 1078297920. Its totient is φ = 305280000.

The previous prime is 663625423. The next prime is 663625441. The reversal of 663625426 is 624526366.

It is not an unprimeable number, because it can be changed into a prime (663625423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 390210 + ... + 391906.

It is an arithmetic number, because the mean of its divisors is an integer number (33696810).

Almost surely, 2^663625426 is an apocalyptic number.

663625426 is a deficient number, since it is larger than the sum of its proper divisors (414672494).

663625426 is a wasteful number, since it uses less digits than its factorization.

663625426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2010.

The product of its digits is 311040, while the sum is 40.

The square root of 663625426 is about 25760.9282829637. The cubic root of 663625426 is about 872.2500554158.

The spelling of 663625426 in words is "six hundred sixty-three million, six hundred twenty-five thousand, four hundred twenty-six".