149666686 has 16 divisors (see below), whose sum is σ = 254494800. Its totient is φ = 65441088.

The previous prime is 149666683. The next prime is 149666689. The reversal of 149666686 is 686666941.

149666686 = T₂₂₈ + T₂₂₉ + ... + T₉₆₈.

It is an interprime number because it is at equal distance from previous prime (149666683) and next prime (149666689).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149666683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150991 + ... + 151978.

It is an arithmetic number, because the mean of its divisors is an integer number (15905925).

Almost surely, 2^149666686 is an apocalyptic number.

149666686 is a deficient number, since it is larger than the sum of its proper divisors (104828114).

149666686 is a wasteful number, since it uses less digits than its factorization.

149666686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303003.

The product of its digits is 2239488, while the sum is 52.

The square root of 149666686 is about 12233.8336591602. The cubic root of 149666686 is about 530.9354383057.

The spelling of 149666686 in words is "one hundred forty-nine million, six hundred sixty-six thousand, six hundred eighty-six".