136660401 has 6 divisors (see below), whose sum is σ = 197398370. Its totient is φ = 91106928.

The previous prime is 136660393. The next prime is 136660409. The reversal of 136660401 is 104066631.

It is an interprime number because it is at equal distance from previous prime (136660393) and next prime (136660409).

It can be written as a sum of positive squares in only one way, i.e., 97535376 + 39125025 = 9876^2 + 6255^2 .

It is not a de Polignac number, because 136660401 - 2³ = 136660393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136660409) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 7592236 + ... + 7592253.

Almost surely, 2^136660401 is an apocalyptic number.

It is an amenable number.

136660401 is a deficient number, since it is larger than the sum of its proper divisors (60737969).

136660401 is a wasteful number, since it uses less digits than its factorization.

136660401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15184495 (or 15184492 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 136660401 is about 11690.1839592027. The cubic root of 136660401 is about 515.0873650760.

The spelling of 136660401 in words is "one hundred thirty-six million, six hundred sixty thousand, four hundred one".