136749566 has 4 divisors (see below), whose sum is σ = 205124352. Its totient is φ = 68374782.

The previous prime is 136749563. The next prime is 136749619. The reversal of 136749566 is 665947631.

136749566 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 665947631 = 2099 ⋅317269.

It is a self number, because there is not a number n which added to its sum of digits gives 136749566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136749563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34187390 + ... + 34187393.

It is an arithmetic number, because the mean of its divisors is an integer number (51281088).

Almost surely, 2^136749566 is an apocalyptic number.

136749566 is a deficient number, since it is larger than the sum of its proper divisors (68374786).

136749566 is an equidigital number, since it uses as much as digits as its factorization.

136749566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68374785.

The product of its digits is 816480, while the sum is 47.

The square root of 136749566 is about 11693.9970070118. The cubic root of 136749566 is about 515.1993647959.

The spelling of 136749566 in words is "one hundred thirty-six million, seven hundred forty-nine thousand, five hundred sixty-six".