667149928 has 16 divisors (see below), whose sum is σ = 1256837760. Its totient is φ = 331993200.

The previous prime is 667149893. The next prime is 667149929. The reversal of 667149928 is 829941766.

It is a happy number.

It is a super-3 number, since 3×667149928³ (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (667149929) 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, 195928 + ... + 199303.

It is an arithmetic number, because the mean of its divisors is an integer number (78552360).

Almost surely, 2^667149928 is an apocalyptic number.

It is an amenable number.

667149928 is a deficient number, since it is larger than the sum of its proper divisors (589687832).

667149928 is a wasteful number, since it uses less digits than its factorization.

667149928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395448 (or 395444 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 52.

The square root of 667149928 is about 25829.2455948678. The cubic root of 667149928 is about 873.7914975826.

The spelling of 667149928 in words is "six hundred sixty-seven million, one hundred forty-nine thousand, nine hundred twenty-eight".