669288264 has 128 divisors (see below), whose sum is σ = 1820206080. Its totient is φ = 204595200.

The previous prime is 669288239. The next prime is 669288307. The reversal of 669288264 is 462882966.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1128352 + ... + 1128944.

It is an arithmetic number, because the mean of its divisors is an integer number (14220360).

Almost surely, 2^669288264 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 669288264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (910103040).

669288264 is an abundant number, since it is smaller than the sum of its proper divisors (1150917816).

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

669288264 is a wasteful number, since it uses less digits than its factorization.

669288264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 711 (or 707 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 51.

The square root of 669288264 is about 25870.6061776681. The cubic root of 669288264 is about 874.7240551353.

The spelling of 669288264 in words is "six hundred sixty-nine million, two hundred eighty-eight thousand, two hundred sixty-four".