666043392 has 176 divisors, whose sum is σ = 2075166720. Its totient is φ = 185966592.

The previous prime is 666043387. The next prime is 666043393. The reversal of 666043392 is 293340666.

It is a super-2 number, since 2×666043392² = 887227600053731328, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 666043392.

It is not an unprimeable number, because it can be changed into a prime (666043393) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1010359 + ... + 1011017.

It is an arithmetic number, because the mean of its divisors is an integer number (11790720).

Almost surely, 2^666043392 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 666043392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1037583360).

666043392 is an abundant number, since it is smaller than the sum of its proper divisors (1409123328).

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

666043392 is a wasteful number, since it uses less digits than its factorization.

666043392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 736 (or 718 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 39.

The square root of 666043392 is about 25807.8164903581. The cubic root of 666043392 is about 873.3081395655.

It can be divided in two parts, 666043 and 392, that added together give a triangular number (666435 = T₁₁₅₄).

The spelling of 666043392 in words is "six hundred sixty-six million, forty-three thousand, three hundred ninety-two".