65873765 has 4 divisors (see below), whose sum is σ = 79048524. Its totient is φ = 52699008.

The previous prime is 65873749. The next prime is 65873777. The reversal of 65873765 is 56737856.

It is a happy number.

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 27520516 + 38353249 = 5246^2 + 6193^2 .

It is a cyclic number.

It is not a de Polignac number, because 65873765 - 2⁴ = 65873749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6587372 + ... + 6587381.

It is an arithmetic number, because the mean of its divisors is an integer number (19762131).

Almost surely, 2^65873765 is an apocalyptic number.

It is an amenable number.

65873765 is a deficient number, since it is larger than the sum of its proper divisors (13174759).

65873765 is a wasteful number, since it uses less digits than its factorization.

65873765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13174758.

The product of its digits is 1058400, while the sum is 47.

The square root of 65873765 is about 8116.2654589411. The cubic root of 65873765 is about 403.8661881613.

The spelling of 65873765 in words is "sixty-five million, eight hundred seventy-three thousand, seven hundred sixty-five".