669506361 has 16 divisors (see below), whose sum is σ = 899760960. Its totient is φ = 442807040.

The previous prime is 669506351. The next prime is 669506381. The reversal of 669506361 is 163605966.

It is a cyclic number.

It is not a de Polignac number, because 669506361 - 2⁵ = 669506329 is a prime.

It is not an unprimeable number, because it can be changed into a prime (669506351) 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, 278581 + ... + 280973.

It is an arithmetic number, because the mean of its divisors is an integer number (56235060).

Almost surely, 2^669506361 is an apocalyptic number.

It is an amenable number.

669506361 is a deficient number, since it is larger than the sum of its proper divisors (230254599).

669506361 is a wasteful number, since it uses less digits than its factorization.

669506361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3096.

The product of its (nonzero) digits is 174960, while the sum is 42.

The square root of 669506361 is about 25874.8209848880. The cubic root of 669506361 is about 874.8190585312.

The spelling of 669506361 in words is "six hundred sixty-nine million, five hundred six thousand, three hundred sixty-one".