669377521522 has 16 divisors (see below), whose sum is σ = 1025454339072. Its totient is φ = 327559755040.

The previous prime is 669377521517. The next prime is 669377521613. The reversal of 669377521522 is 225125773966.

669377521522 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6254622 + ... + 6360742.

It is an arithmetic number, because the mean of its divisors is an integer number (64090896192).

Almost surely, 2^669377521522 is an apocalyptic number.

669377521522 is a deficient number, since it is larger than the sum of its proper divisors (356076817550).

669377521522 is a wasteful number, since it uses less digits than its factorization.

669377521522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173273.

The product of its digits is 9525600, while the sum is 55.

The spelling of 669377521522 in words is "six hundred sixty-nine billion, three hundred seventy-seven million, five hundred twenty-one thousand, five hundred twenty-two".