669307536 has 60 divisors (see below), whose sum is σ = 1942518032. Its totient is φ = 223101216.

The previous prime is 669307531. The next prime is 669307537. The reversal of 669307536 is 635703966.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 669307491 and 669307500.

It is not an unprimeable number, because it can be changed into a prime (669307531) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 82186 + ... + 89961.

Almost surely, 2^669307536 is an apocalyptic number.

It is an amenable number.

669307536 is an abundant number, since it is smaller than the sum of its proper divisors (1273210496).

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

669307536 is a wasteful number, since it uses less digits than its factorization.

669307536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172170 (or 172152 counting only the distinct ones).

The product of its (nonzero) digits is 612360, while the sum is 45.

The square root of 669307536 is about 25870.9786440328. The cubic root of 669307536 is about 874.7324508800.

The spelling of 669307536 in words is "six hundred sixty-nine million, three hundred seven thousand, five hundred thirty-six".