663628629 has 4 divisors (see below), whose sum is σ = 884838176. Its totient is φ = 442419084.

The previous prime is 663628613. The next prime is 663628657. The reversal of 663628629 is 926826366.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 663628629 - 2⁴ = 663628613 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 (663628429) 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, 110604769 + ... + 110604774.

It is an arithmetic number, because the mean of its divisors is an integer number (221209544).

Almost surely, 2^663628629 is an apocalyptic number.

It is an amenable number.

663628629 is a deficient number, since it is larger than the sum of its proper divisors (221209547).

663628629 is a wasteful number, since it uses less digits than its factorization.

663628629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221209546.

The product of its digits is 1119744, while the sum is 48.

The square root of 663628629 is about 25760.9904506795. The cubic root of 663628629 is about 872.2514587237.

The spelling of 663628629 in words is "six hundred sixty-three million, six hundred twenty-eight thousand, six hundred twenty-nine".