609766664 has 32 divisors (see below), whose sum is σ = 1248141720. Its totient is φ = 277572096.

The previous prime is 609766649. The next prime is 609766669. The reversal of 609766664 is 466667906.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 290429764 + 319336900 = 17042^2 + 17870^2 .

It is not an unprimeable number, because it can be changed into a prime (609766669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32567 + ... + 47750.

Almost surely, 2^609766664 is an apocalyptic number.

It is an amenable number.

609766664 is an abundant number, since it is smaller than the sum of its proper divisors (638375056).

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

609766664 is a wasteful number, since it uses less digits than its factorization.

609766664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80409 (or 80405 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 50.

The square root of 609766664 is about 24693.4538693962. The cubic root of 609766664 is about 847.9844581523.

The spelling of 609766664 in words is "six hundred nine million, seven hundred sixty-six thousand, six hundred sixty-four".