669520346 has 24 divisors (see below), whose sum is σ = 1105249152. Its totient is φ = 303949800.

The previous prime is 669520337. The next prime is 669520351. The reversal of 669520346 is 643025966.

669520346 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×669520346³ (a number of 27 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 311351 + ... + 313493.

It is an arithmetic number, because the mean of its divisors is an integer number (46052048).

Almost surely, 2^669520346 is an apocalyptic number.

669520346 is a deficient number, since it is larger than the sum of its proper divisors (435728806).

669520346 is a wasteful number, since it uses less digits than its factorization.

669520346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3458 (or 3447 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 41.

The square root of 669520346 is about 25875.0912268923. The cubic root of 669520346 is about 874.8251497152.

The spelling of 669520346 in words is "six hundred sixty-nine million, five hundred twenty thousand, three hundred forty-six".