669650540 has 48 divisors (see below), whose sum is σ = 1551402720. Its totient is φ = 241221120.

The previous prime is 669650473. The next prime is 669650563. The reversal of 669650540 is 45056966.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20750 + ... + 42069.

It is an arithmetic number, because the mean of its divisors is an integer number (32320890).

Almost surely, 2^669650540 is an apocalyptic number.

It is an amenable number.

669650540 is an abundant number, since it is smaller than the sum of its proper divisors (881752180).

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

669650540 is a wasteful number, since it uses less digits than its factorization.

669650540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62882 (or 62880 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 41.

The square root of 669650540 is about 25877.6069218156. The cubic root of 669650540 is about 874.8818518027.

The spelling of 669650540 in words is "six hundred sixty-nine million, six hundred fifty thousand, five hundred forty".