65941881 has 16 divisors (see below), whose sum is σ = 91838400. Its totient is φ = 42043968.

The previous prime is 65941877. The next prime is 65941903. The reversal of 65941881 is 18814956.

It is not a de Polignac number, because 65941881 - 2² = 65941877 is a prime.

It is a super-2 number, since 2×65941881² = 8696663339636322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (65941871) 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, 1515 + ... + 11583.

It is an arithmetic number, because the mean of its divisors is an integer number (5739900).

Almost surely, 2^65941881 is an apocalyptic number.

It is an amenable number.

65941881 is a deficient number, since it is larger than the sum of its proper divisors (25896519).

65941881 is a wasteful number, since it uses less digits than its factorization.

65941881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10168.

The product of its digits is 69120, while the sum is 42.

The square root of 65941881 is about 8120.4606396435. The cubic root of 65941881 is about 404.0053445850.

The spelling of 65941881 in words is "sixty-five million, nine hundred forty-one thousand, eight hundred eighty-one".