136815666 has 32 divisors (see below), whose sum is σ = 296412480. Its totient is φ = 41849664.

The previous prime is 136815587. The next prime is 136815671. The reversal of 136815666 is 666518631.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8425 + ... + 18563.

It is an arithmetic number, because the mean of its divisors is an integer number (9262890).

Almost surely, 2^136815666 is an apocalyptic number.

136815666 is an abundant number, since it is smaller than the sum of its proper divisors (159596814).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

136815666 is a wasteful number, since it uses less digits than its factorization.

136815666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10330.

The product of its digits is 155520, while the sum is 42.

The square root of 136815666 is about 11696.8229019679. The cubic root of 136815666 is about 515.2823612630.

The spelling of 136815666 in words is "one hundred thirty-six million, eight hundred fifteen thousand, six hundred sixty-six".