149666285 has 4 divisors (see below), whose sum is σ = 179599548. Its totient is φ = 119733024.

The previous prime is 149666281. The next prime is 149666333. The reversal of 149666285 is 582666941.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 582666941 = 173 ⋅3368017.

It can be written as a sum of positive squares in 2 ways, for example, as 105124009 + 44542276 = 10253^2 + 6674^2 .

It is a cyclic number.

It is not a de Polignac number, because 149666285 - 2² = 149666281 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149666281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14966624 + ... + 14966633.

It is an arithmetic number, because the mean of its divisors is an integer number (44899887).

Almost surely, 2^149666285 is an apocalyptic number.

It is an amenable number.

149666285 is a deficient number, since it is larger than the sum of its proper divisors (29933263).

149666285 is an equidigital number, since it uses as much as digits as its factorization.

149666285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29933262.

The product of its digits is 622080, while the sum is 47.

The square root of 149666285 is about 12233.8172701737. The cubic root of 149666285 is about 530.9349641291.

The spelling of 149666285 in words is "one hundred forty-nine million, six hundred sixty-six thousand, two hundred eighty-five".