669942504 has 288 divisors, whose sum is σ = 2348555040. Its totient is φ = 170553600.

The previous prime is 669942491. The next prime is 669942509. The reversal of 669942504 is 405249966.

It is a self number, because there is not a number n which added to its sum of digits gives 669942504.

It is not an unprimeable number, because it can be changed into a prime (669942509) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2367147 + ... + 2367429.

It is an arithmetic number, because the mean of its divisors is an integer number (8154705).

Almost surely, 2^669942504 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 669942504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1174277520).

669942504 is an abundant number, since it is smaller than the sum of its proper divisors (1678612536).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

669942504 is a wasteful number, since it uses less digits than its factorization.

669942504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381 (or 367 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 45.

The square root of 669942504 is about 25883.2475551272. The cubic root of 669942504 is about 875.0089812411.

The spelling of 669942504 in words is "six hundred sixty-nine million, nine hundred forty-two thousand, five hundred four".