666322016 has 12 divisors (see below), whose sum is σ = 1311821532. Its totient is φ = 333160992.

The previous prime is 666321977. The next prime is 666322049. The reversal of 666322016 is 610223666.

It is a Harshad number since it is a multiple of its sum of digits (32), and also a Moran number because the ratio is a prime number: 20822563 = 666322016 / (6 + 6 + 6 + 3 + 2 + 2 + 0 + 1 + 6).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10411250 + ... + 10411313.

It is an arithmetic number, because the mean of its divisors is an integer number (109318461).

Almost surely, 2^666322016 is an apocalyptic number.

It is an amenable number.

666322016 is a deficient number, since it is larger than the sum of its proper divisors (645499516).

666322016 is a wasteful number, since it uses less digits than its factorization.

666322016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20822573 (or 20822565 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 666322016 is about 25813.2139804403. The cubic root of 666322016 is about 873.4298987422.

The spelling of 666322016 in words is "six hundred sixty-six million, three hundred twenty-two thousand, sixteen".