666256132 has 24 divisors (see below), whose sum is σ = 1177892352. Its totient is φ = 329733600.

The previous prime is 666256117. The next prime is 666256133. The reversal of 666256132 is 231652666.

It is a junction number, because it is equal to n+sod(n) for n = 666256091 and 666256100.

It is not an unprimeable number, because it can be changed into a prime (666256133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 159138 + ... + 163270.

It is an arithmetic number, because the mean of its divisors is an integer number (49078848).

Almost surely, 2^666256132 is an apocalyptic number.

It is an amenable number.

666256132 is a deficient number, since it is larger than the sum of its proper divisors (511636220).

666256132 is a wasteful number, since it uses less digits than its factorization.

666256132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4539 (or 4537 counting only the distinct ones).

The product of its digits is 77760, while the sum is 37.

The square root of 666256132 is about 25811.9377808021. The cubic root of 666256132 is about 873.4011103832.

The spelling of 666256132 in words is "six hundred sixty-six million, two hundred fifty-six thousand, one hundred thirty-two".