149666678 has 32 divisors (see below), whose sum is σ = 264384000. Its totient is φ = 63512232.

The previous prime is 149666669. The next prime is 149666683. The reversal of 149666678 is 876666941.

It is a super-2 number, since 2×149666678² = 44800229007111368, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72383 + ... + 74421.

It is an arithmetic number, because the mean of its divisors is an integer number (8262000).

Almost surely, 2^149666678 is an apocalyptic number.

149666678 is a deficient number, since it is larger than the sum of its proper divisors (114717322).

149666678 is a wasteful number, since it uses less digits than its factorization.

149666678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2169 (or 2155 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 53.

The square root of 149666678 is about 12233.8333321980. The cubic root of 149666678 is about 530.9354288458.

The spelling of 149666678 in words is "one hundred forty-nine million, six hundred sixty-six thousand, six hundred seventy-eight".