149155866 has 12 divisors (see below), whose sum is σ = 323171082. Its totient is φ = 49718616.

The previous prime is 149155859. The next prime is 149155879. The reversal of 149155866 is 668551941.

149155866 is a `hidden beast` number, since 1 + 4 + 91 + 558 + 6 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 112975641 + 36180225 = 10629^2 + 6015^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4143201 + ... + 4143236.

Almost surely, 2^149155866 is an apocalyptic number.

149155866 is an abundant number, since it is smaller than the sum of its proper divisors (174015216).

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

149155866 is a wasteful number, since it uses less digits than its factorization.

149155866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8286445 (or 8286442 counting only the distinct ones).

The product of its digits is 259200, while the sum is 45.

The square root of 149155866 is about 12212.9384670521. The cubic root of 149155866 is about 530.3307132592.

The spelling of 149155866 in words is "one hundred forty-nine million, one hundred fifty-five thousand, eight hundred sixty-six".