669522801 has 16 divisors (see below), whose sum is σ = 936673920. Its totient is φ = 424575360.

The previous prime is 669522793. The next prime is 669522811. The reversal of 669522801 is 108225966.

It is not a de Polignac number, because 669522801 - 2³ = 669522793 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 669522801.

It is not an unprimeable number, because it can be changed into a prime (669522811) 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, 14316 + ... + 39293.

It is an arithmetic number, because the mean of its divisors is an integer number (58542120).

Almost surely, 2^669522801 is an apocalyptic number.

It is an amenable number.

669522801 is a deficient number, since it is larger than the sum of its proper divisors (267151119).

669522801 is a wasteful number, since it uses less digits than its factorization.

669522801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53816.

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 669522801 is about 25875.1386662951. The cubic root of 669522801 is about 874.8262189848.

The spelling of 669522801 in words is "six hundred sixty-nine million, five hundred twenty-two thousand, eight hundred one".