666536370 has 32 divisors (see below), whose sum is σ = 1615533120. Its totient is φ = 175982400.

The previous prime is 666536369. The next prime is 666536399. The reversal of 666536370 is 73635666.

It is a happy 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, 106960 + ... + 113019.

It is an arithmetic number, because the mean of its divisors is an integer number (50485410).

Almost surely, 2^666536370 is an apocalyptic number.

666536370 is an abundant number, since it is smaller than the sum of its proper divisors (948996750).

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

666536370 is a wasteful number, since it uses less digits than its factorization.

666536370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220090.

The product of its (nonzero) digits is 408240, while the sum is 42.

The square root of 666536370 is about 25817.3656673178. The cubic root of 666536370 is about 873.5235487168.

The spelling of 666536370 in words is "six hundred sixty-six million, five hundred thirty-six thousand, three hundred seventy".