666152818 has 32 divisors (see below), whose sum is σ = 1084609152. Its totient is φ = 306028800.

The previous prime is 666152791. The next prime is 666152821. The reversal of 666152818 is 818251666.

It is a super-2 number, since 2×666152818² = 887519153858682248, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (43).

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, 117898 + ... + 123418.

It is an arithmetic number, because the mean of its divisors is an integer number (33894036).

Almost surely, 2^666152818 is an apocalyptic number.

666152818 is a deficient number, since it is larger than the sum of its proper divisors (418456334).

666152818 is a wasteful number, since it uses less digits than its factorization.

666152818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5650.

The product of its digits is 138240, while the sum is 43.

The square root of 666152818 is about 25809.9364199139. The cubic root of 666152818 is about 873.3559629679.

The spelling of 666152818 in words is "six hundred sixty-six million, one hundred fifty-two thousand, eight hundred eighteen".