65890791 has 12 divisors (see below), whose sum is σ = 99313968. Its totient is φ = 42017184.

The previous prime is 65890771. The next prime is 65890801. The reversal of 65890791 is 19709856.

It is not a de Polignac number, because 65890791 - 2¹⁰ = 65889767 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65890711) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 158950 + ... + 159363.

It is an arithmetic number, because the mean of its divisors is an integer number (8276164).

Almost surely, 2^65890791 is an apocalyptic number.

65890791 is a deficient number, since it is larger than the sum of its proper divisors (33423177).

65890791 is a wasteful number, since it uses less digits than its factorization.

65890791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318342 (or 318339 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 45.

The square root of 65890791 is about 8117.3142725904. The cubic root of 65890791 is about 403.9009801273.

The spelling of 65890791 in words is "sixty-five million, eight hundred ninety thousand, seven hundred ninety-one".