666515022 has 96 divisors (see below), whose sum is σ = 1556381952. Its totient is φ = 189243648.

The previous prime is 666514997. The next prime is 666515023. The reversal of 666515022 is 220515666.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666515023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 846513 + ... + 847299.

It is an arithmetic number, because the mean of its divisors is an integer number (16212312).

Almost surely, 2^666515022 is an apocalyptic number.

666515022 is an abundant number, since it is smaller than the sum of its proper divisors (889866930).

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

666515022 is a wasteful number, since it uses less digits than its factorization.

666515022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 870 (or 851 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 666515022 is about 25816.9522213603. The cubic root of 666515022 is about 873.5142228042.

The spelling of 666515022 in words is "six hundred sixty-six million, five hundred fifteen thousand, twenty-two".