136378566 has 40 divisors (see below), whose sum is σ = 306328440. Its totient is φ = 45349632.

The previous prime is 136378553. The next prime is 136378597. The reversal of 136378566 is 665873631.

136378566 is a `hidden beast` number, since 1 + 3 + 637 + 8 + 5 + 6 + 6 = 666.

It is a super-2 number, since 2×136378566² = 37198226528432712, which contains 22 as substring.

It is a congruent number.

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 19 ways as a sum of consecutive naturals, for example, 92745 + ... + 94203.

It is an arithmetic number, because the mean of its divisors is an integer number (7658211).

Almost surely, 2^136378566 is an apocalyptic number.

136378566 is an abundant number, since it is smaller than the sum of its proper divisors (169949874).

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

136378566 is a wasteful number, since it uses less digits than its factorization.

136378566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2050 (or 2041 counting only the distinct ones).

The product of its digits is 544320, while the sum is 45.

The square root of 136378566 is about 11678.1233937649. The cubic root of 136378566 is about 514.7330328396.

The spelling of 136378566 in words is "one hundred thirty-six million, three hundred seventy-eight thousand, five hundred sixty-six".