149217668 has 12 divisors (see below), whose sum is σ = 266687232. Its totient is φ = 73021320.

The previous prime is 149217637. The next prime is 149217671. The reversal of 149217668 is 866712941.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 396668 + ... + 397043.

It is an arithmetic number, because the mean of its divisors is an integer number (22223936).

Almost surely, 2^149217668 is an apocalyptic number.

It is an amenable number.

149217668 is a deficient number, since it is larger than the sum of its proper divisors (117469564).

149217668 is a wasteful number, since it uses less digits than its factorization.

149217668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 793762 (or 793760 counting only the distinct ones).

The product of its digits is 145152, while the sum is 44.

The square root of 149217668 is about 12215.4683905285. The cubic root of 149217668 is about 530.4039497866.

The spelling of 149217668 in words is "one hundred forty-nine million, two hundred seventeen thousand, six hundred sixty-eight".