136665420 has 48 divisors (see below), whose sum is σ = 393011808. Its totient is φ = 35458560.

The previous prime is 136665413. The next prime is 136665427. The reversal of 136665420 is 24566631.

It is an interprime number because it is at equal distance from previous prime (136665413) and next prime (136665427).

It is not an unprimeable number, because it can be changed into a prime (136665427) 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 15 ways as a sum of consecutive naturals, for example, 28561 + ... + 33000.

It is an arithmetic number, because the mean of its divisors is an integer number (8187746).

Almost surely, 2^136665420 is an apocalyptic number.

136665420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

136665420 is an abundant number, since it is smaller than the sum of its proper divisors (256346388).

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

136665420 is a wasteful number, since it uses less digits than its factorization.

136665420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61610 (or 61608 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 136665420 is about 11690.3986245123. The cubic root of 136665420 is about 515.0936707111.

The spelling of 136665420 in words is "one hundred thirty-six million, six hundred sixty-five thousand, four hundred twenty".