65930891 has 16 divisors (see below), whose sum is σ = 73936800. Its totient is φ = 58372608.

The previous prime is 65930807. The next prime is 65930927. The reversal of 65930891 is 19803956.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65930891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65930191) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66995 + ... + 67971.

It is an arithmetic number, because the mean of its divisors is an integer number (4621050).

Almost surely, 2^65930891 is an apocalyptic number.

65930891 is a deficient number, since it is larger than the sum of its proper divisors (8005909).

65930891 is a wasteful number, since it uses less digits than its factorization.

65930891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1198.

The product of its (nonzero) digits is 58320, while the sum is 41.

The square root of 65930891 is about 8119.7839256965. The cubic root of 65930891 is about 403.9828992369.

The spelling of 65930891 in words is "sixty-five million, nine hundred thirty thousand, eight hundred ninety-one".