149491668 has 12 divisors (see below), whose sum is σ = 348813920. Its totient is φ = 49830552.

The previous prime is 149491649. The next prime is 149491709. The reversal of 149491668 is 866194941.

149491668 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

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, 6228808 + ... + 6228831.

Almost surely, 2^149491668 is an apocalyptic number.

It is an amenable number.

149491668 is an abundant number, since it is smaller than the sum of its proper divisors (199322252).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

149491668 is a wasteful number, since it uses less digits than its factorization.

149491668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12457646 (or 12457644 counting only the distinct ones).

The product of its digits is 373248, while the sum is 48.

The square root of 149491668 is about 12226.6785350724. The cubic root of 149491668 is about 530.7284015771.

The spelling of 149491668 in words is "one hundred forty-nine million, four hundred ninety-one thousand, six hundred sixty-eight".