666890952 has 64 divisors (see below), whose sum is σ = 2051978880. Its totient is φ = 175882752.

The previous prime is 666890933. The next prime is 666890963. The reversal of 666890952 is 259098666.

It is a junction number, because it is equal to n+sod(n) for n = 666890895 and 666890904.

It is an unprimeable number.

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, 150493 + ... + 154860.

It is an arithmetic number, because the mean of its divisors is an integer number (32062170).

Almost surely, 2^666890952 is an apocalyptic number.

It is an amenable number.

666890952 is an abundant number, since it is smaller than the sum of its proper divisors (1385087928).

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

666890952 is a wasteful number, since it uses less digits than its factorization.

666890952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305382 (or 305378 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 51.

The square root of 666890952 is about 25824.2318762824. The cubic root of 666890952 is about 873.6784193951.

The spelling of 666890952 in words is "six hundred sixty-six million, eight hundred ninety thousand, nine hundred fifty-two".