666354120 has 64 divisors (see below), whose sum is σ = 2000877120. Its totient is φ = 177533184.

The previous prime is 666354113. The next prime is 666354133. The reversal of 666354120 is 21453666.

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, 193534 + ... + 196946.

It is an arithmetic number, because the mean of its divisors is an integer number (31263705).

Almost surely, 2^666354120 is an apocalyptic number.

666354120 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

666354120 is an abundant number, since it is smaller than the sum of its proper divisors (1334523000).

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

666354120 is a wasteful number, since it uses less digits than its factorization.

666354120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5054 (or 5050 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 666354120 is about 25813.8358249990. The cubic root of 666354120 is about 873.4439260656.

The spelling of 666354120 in words is "six hundred sixty-six million, three hundred fifty-four thousand, one hundred twenty".