606521664 has 84 divisors (see below), whose sum is σ = 1986853024. Its totient is φ = 173290752.

The previous prime is 606521653. The next prime is 606521683. The reversal of 606521664 is 466125606.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (84).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71182 + ... + 79245.

Almost surely, 2^606521664 is an apocalyptic number.

606521664 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

606521664 is an abundant number, since it is smaller than the sum of its proper divisors (1380331360).

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

606521664 is a wasteful number, since it uses less digits than its factorization.

606521664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150452 (or 150439 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 606521664 is about 24627.6605466293. The cubic root of 606521664 is about 846.4775400272.

The spelling of 606521664 in words is "six hundred six million, five hundred twenty-one thousand, six hundred sixty-four".