149206666 has 12 divisors (see below), whose sum is σ = 260350578. Its totient is φ = 63945672.

The previous prime is 149206657. The next prime is 149206679. The reversal of 149206666 is 666602941.

It can be written as a sum of positive squares in only one way, i.e., 149206225 + 441 = 12215^2 + 21^2 .

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, 761161 + ... + 761356.

Almost surely, 2^149206666 is an apocalyptic number.

149206666 is a deficient number, since it is larger than the sum of its proper divisors (111143912).

149206666 is a wasteful number, since it uses less digits than its factorization.

149206666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1522533 (or 1522526 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 40.

The square root of 149206666 is about 12215.0180515626. The cubic root of 149206666 is about 530.3909136903.

The spelling of 149206666 in words is "one hundred forty-nine million, two hundred six thousand, six hundred sixty-six".