65790149 has 4 divisors (see below), whose sum is σ = 65812620. Its totient is φ = 65767680.

The previous prime is 65790139. The next prime is 65790157. The reversal of 65790149 is 94109756.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 34597924 + 31192225 = 5882^2 + 5585^2 .

It is a cyclic number.

It is not a de Polignac number, because 65790149 - 2¹⁶ = 65724613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65790139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6044 + ... + 12965.

It is an arithmetic number, because the mean of its divisors is an integer number (16453155).

Almost surely, 2^65790149 is an apocalyptic number.

It is an amenable number.

65790149 is a deficient number, since it is larger than the sum of its proper divisors (22471).

65790149 is a wasteful number, since it uses less digits than its factorization.

65790149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22470.

The product of its (nonzero) digits is 68040, while the sum is 41.

The square root of 65790149 is about 8111.1126856924. The cubic root of 65790149 is about 403.6952350581.

The spelling of 65790149 in words is "sixty-five million, seven hundred ninety thousand, one hundred forty-nine".