669167740 has 12 divisors (see below), whose sum is σ = 1405252296. Its totient is φ = 267667088.

The previous prime is 669167729. The next prime is 669167797. The reversal of 669167740 is 47761966.

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, 16729174 + ... + 16729213.

It is an arithmetic number, because the mean of its divisors is an integer number (117104358).

Almost surely, 2^669167740 is an apocalyptic number.

It is an amenable number.

669167740 is an abundant number, since it is smaller than the sum of its proper divisors (736084556).

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

669167740 is a wasteful number, since it uses less digits than its factorization.

669167740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33458396 (or 33458394 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 46.

The square root of 669167740 is about 25868.2767110606. The cubic root of 669167740 is about 874.6715458372.

The spelling of 669167740 in words is "six hundred sixty-nine million, one hundred sixty-seven thousand, seven hundred forty".