65920837 has 4 divisors (see below), whose sum is σ = 67323456. Its totient is φ = 64518220.

The previous prime is 65920819. The next prime is 65920843. The reversal of 65920837 is 73802956.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 65920837 - 2¹¹ = 65918789 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 65920837.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65920847) 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, 701239 + ... + 701332.

It is an arithmetic number, because the mean of its divisors is an integer number (16830864).

Almost surely, 2^65920837 is an apocalyptic number.

It is an amenable number.

65920837 is a deficient number, since it is larger than the sum of its proper divisors (1402619).

65920837 is a wasteful number, since it uses less digits than its factorization.

65920837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1402618.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 65920837 is about 8119.1647969480. The cubic root of 65920837 is about 403.9623633370.

The spelling of 65920837 in words is "sixty-five million, nine hundred twenty thousand, eight hundred thirty-seven".