149218668 has 18 divisors (see below), whose sum is σ = 377191724. Its totient is φ = 49739544.

The previous prime is 149218661. The next prime is 149218759. The reversal of 149218668 is 866812941.

149218668 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 (18).

It is not an unprimeable number, because it can be changed into a prime (149218661) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2072446 + ... + 2072517.

Almost surely, 2^149218668 is an apocalyptic number.

149218668 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

149218668 is an abundant number, since it is smaller than the sum of its proper divisors (227973056).

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

149218668 is a wasteful number, since it uses less digits than its factorization.

149218668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4144973 (or 4144968 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The square root of 149218668 is about 12215.5093221691. The cubic root of 149218668 is about 530.4051346390.

The spelling of 149218668 in words is "one hundred forty-nine million, two hundred eighteen thousand, six hundred sixty-eight".