669577536 has 112 divisors (see below), whose sum is σ = 1975104000. Its totient is φ = 222437376.

The previous prime is 669577523. The next prime is 669577543. The reversal of 669577536 is 635775966.

669577536 is a `hidden beast` number, since 6 + 69 + 577 + 5 + 3 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

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, 775441 + ... + 776303.

Almost surely, 2^669577536 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 669577536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (987552000).

669577536 is an abundant number, since it is smaller than the sum of its proper divisors (1305526464).

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

669577536 is a wasteful number, since it uses less digits than its factorization.

669577536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1333 (or 1317 counting only the distinct ones).

The product of its digits is 7144200, while the sum is 54.

The square root of 669577536 is about 25876.1963201704. The cubic root of 669577536 is about 874.8500580077.

The spelling of 669577536 in words is "six hundred sixty-nine million, five hundred seventy-seven thousand, five hundred thirty-six".