667661336 has 16 divisors (see below), whose sum is σ = 1252141200. Its totient is φ = 333757024.

The previous prime is 667661327. The next prime is 667661359. The reversal of 667661336 is 633166766.

667661336 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59381 + ... + 69723.

It is an arithmetic number, because the mean of its divisors is an integer number (78258825).

Almost surely, 2^667661336 is an apocalyptic number.

It is an amenable number.

667661336 is a deficient number, since it is larger than the sum of its proper divisors (584479864).

667661336 is a wasteful number, since it uses less digits than its factorization.

667661336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18418 (or 18414 counting only the distinct ones).

The product of its digits is 489888, while the sum is 44.

The square root of 667661336 is about 25839.1434842566. The cubic root of 667661336 is about 874.0147106915.

The spelling of 667661336 in words is "six hundred sixty-seven million, six hundred sixty-one thousand, three hundred thirty-six".