669358406 has 8 divisors (see below), whose sum is σ = 1004648520. Its totient is φ = 334475568.

The previous prime is 669358399. The next prime is 669358447. The reversal of 669358406 is 604853966.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97676 + ... + 104303.

It is an arithmetic number, because the mean of its divisors is an integer number (125581065).

Almost surely, 2^669358406 is an apocalyptic number.

669358406 is a deficient number, since it is larger than the sum of its proper divisors (335290114).

669358406 is a wasteful number, since it uses less digits than its factorization.

669358406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203638.

The product of its (nonzero) digits is 933120, while the sum is 47.

The square root of 669358406 is about 25871.9617733175. The cubic root of 669358406 is about 874.7546113519.

The spelling of 669358406 in words is "six hundred sixty-nine million, three hundred fifty-eight thousand, four hundred six".