667661230 has 16 divisors (see below), whose sum is σ = 1272484080. Its totient is φ = 251354752.

The previous prime is 667661221. The next prime is 667661233. The reversal of 667661230 is 32166766.

It is a super-2 number, since 2×667661230² = 891543036090225800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 667661230.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667661233) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1963540 + ... + 1963879.

It is an arithmetic number, because the mean of its divisors is an integer number (79530255).

Almost surely, 2^667661230 is an apocalyptic number.

667661230 is a deficient number, since it is larger than the sum of its proper divisors (604822850).

667661230 is a wasteful number, since it uses less digits than its factorization.

667661230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3927443.

The product of its (nonzero) digits is 54432, while the sum is 37.

The square root of 667661230 is about 25839.1414331049. The cubic root of 667661230 is about 874.0146644377.

The spelling of 667661230 in words is "six hundred sixty-seven million, six hundred sixty-one thousand, two hundred thirty".