669898132 has 12 divisors (see below), whose sum is σ = 1173312756. Its totient is φ = 334665920.

The previous prime is 669898123. The next prime is 669898183. The reversal of 669898132 is 231898966.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 490445316 + 179452816 = 22146^2 + 13396^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 669898132.

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, 65419 + ... + 74962.

It is an arithmetic number, because the mean of its divisors is an integer number (97776063).

Almost surely, 2^669898132 is an apocalyptic number.

It is an amenable number.

669898132 is a deficient number, since it is larger than the sum of its proper divisors (503414624).

669898132 is a wasteful number, since it uses less digits than its factorization.

669898132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141578 (or 141576 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 52.

The square root of 669898132 is about 25882.3903841975. The cubic root of 669898132 is about 874.9896627894.

The spelling of 669898132 in words is "six hundred sixty-nine million, eight hundred ninety-eight thousand, one hundred thirty-two".