666814074 has 32 divisors (see below), whose sum is σ = 1371819456. Its totient is φ = 215925120.

The previous prime is 666814073. The next prime is 666814117. The reversal of 666814074 is 470418666.

It is not an unprimeable number, because it can be changed into a prime (666814073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 166969 + ... + 170915.

It is an arithmetic number, because the mean of its divisors is an integer number (42869358).

Almost surely, 2^666814074 is an apocalyptic number.

666814074 is an abundant number, since it is smaller than the sum of its proper divisors (705005382).

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

666814074 is a wasteful number, since it uses less digits than its factorization.

666814074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4750.

The product of its (nonzero) digits is 193536, while the sum is 42.

The square root of 666814074 is about 25822.7433476771. The cubic root of 666814074 is about 873.6448460748.

The spelling of 666814074 in words is "six hundred sixty-six million, eight hundred fourteen thousand, seventy-four".