666885026 has 8 divisors (see below), whose sum is σ = 1007524560. Its totient is φ = 331043508.

The previous prime is 666885013. The next prime is 666885029. The reversal of 666885026 is 620588666.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (666885029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1199156 + ... + 1199711.

It is an arithmetic number, because the mean of its divisors is an integer number (125940570).

Almost surely, 2^666885026 is an apocalyptic number.

666885026 is a deficient number, since it is larger than the sum of its proper divisors (340639534).

666885026 is a wasteful number, since it uses less digits than its factorization.

666885026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2399008.

The product of its (nonzero) digits is 829440, while the sum is 47.

The square root of 666885026 is about 25824.1171388297. The cubic root of 666885026 is about 873.6758315489.

The spelling of 666885026 in words is "six hundred sixty-six million, eight hundred eighty-five thousand, twenty-six".