149866 has 4 divisors (see below), whose sum is σ = 224802. Its totient is φ = 74932.

The previous prime is 149861. The next prime is 149867. The reversal of 149866 is 668941.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 133225 + 16641 = 365^2 + 129^2 .

It is a super-3 number, since 3×149866³ = 10097889233381688, which contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (149861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37465 + ... + 37468.

2¹⁴⁹⁸⁶⁶ is an apocalyptic number.

149866 is a deficient number, since it is larger than the sum of its proper divisors (74936).

149866 is an equidigital number, since it uses as much as digits as its factorization.

149866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74935.

The product of its digits is 10368, while the sum is 34.

The square root of 149866 is about 387.1253027122. The cubic root of 149866 is about 53.1171019400.

The spelling of 149866 in words is "one hundred forty-nine thousand, eight hundred sixty-six".