669892560 has 80 divisors (see below), whose sum is σ = 2084759424. Its totient is φ = 177942016.

The previous prime is 669892543. The next prime is 669892567. The reversal of 669892560 is 65298966.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669892567) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57814 + ... + 68426.

Almost surely, 2^669892560 is an apocalyptic number.

669892560 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 669892560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1042379712).

669892560 is an abundant number, since it is smaller than the sum of its proper divisors (1414866864).

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

669892560 is a wasteful number, since it uses less digits than its factorization.

669892560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10892 (or 10886 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 51.

The square root of 669892560 is about 25882.2827432203. The cubic root of 669892560 is about 874.9872368206.

The spelling of 669892560 in words is "six hundred sixty-nine million, eight hundred ninety-two thousand, five hundred sixty".