666154952 has 16 divisors (see below), whose sum is σ = 1251722160. Its totient is φ = 332362384.

The previous prime is 666154949. The next prime is 666154961. The reversal of 666154952 is 259451666.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 85418 + ... + 92889.

It is an arithmetic number, because the mean of its divisors is an integer number (78232635).

Almost surely, 2^666154952 is an apocalyptic number.

It is an amenable number.

666154952 is a deficient number, since it is larger than the sum of its proper divisors (585567208).

666154952 is a wasteful number, since it uses less digits than its factorization.

666154952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178780 (or 178776 counting only the distinct ones).

The product of its digits is 388800, while the sum is 44.

The square root of 666154952 is about 25809.9777605483. The cubic root of 666154952 is about 873.3568955566.

The spelling of 666154952 in words is "six hundred sixty-six million, one hundred fifty-four thousand, nine hundred fifty-two".