65136671 has 4 divisors (see below), whose sum is σ = 65467512. Its totient is φ = 64805832.

The previous prime is 65136641. The next prime is 65136677. The reversal of 65136671 is 17663156.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 65136671 - 2¹⁸ = 64874527 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 (65136677) 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, 165125 + ... + 165518.

It is an arithmetic number, because the mean of its divisors is an integer number (16366878).

Almost surely, 2^65136671 is an apocalyptic number.

65136671 is a deficient number, since it is larger than the sum of its proper divisors (330841).

65136671 is a wasteful number, since it uses less digits than its factorization.

65136671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330840.

The product of its digits is 22680, while the sum is 35.

The square root of 65136671 is about 8070.7292731202. The cubic root of 65136671 is about 402.3541819696.

The spelling of 65136671 in words is "sixty-five million, one hundred thirty-six thousand, six hundred seventy-one".