669325956428 has 24 divisors (see below), whose sum is σ = 1248435032544. Its totient is φ = 312890976000.

The previous prime is 669325956421. The next prime is 669325956433. The reversal of 669325956428 is 824659523966.

It is not an unprimeable number, because it can be changed into a prime (669325956421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32582543 + ... + 32603078.

It is an arithmetic number, because the mean of its divisors is an integer number (52018126356).

Almost surely, 2^669325956428 is an apocalyptic number.

669325956428 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

669325956428 is a deficient number, since it is larger than the sum of its proper divisors (579109076116).

669325956428 is a wasteful number, since it uses less digits than its factorization.

669325956428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65185793 (or 65185791 counting only the distinct ones).

The product of its digits is 167961600, while the sum is 65.

The spelling of 669325956428 in words is "six hundred sixty-nine billion, three hundred twenty-five million, nine hundred fifty-six thousand, four hundred twenty-eight".