65291961 has 48 divisors (see below), whose sum is σ = 108144960. Its totient is φ = 34836480.

The previous prime is 65291957. The next prime is 65291971. The reversal of 65291961 is 16919256.

It is not a de Polignac number, because 65291961 - 2² = 65291957 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65291971) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 270801 + ... + 271041.

It is an arithmetic number, because the mean of its divisors is an integer number (2253020).

Almost surely, 2^65291961 is an apocalyptic number.

It is an amenable number.

65291961 is a deficient number, since it is larger than the sum of its proper divisors (42852999).

65291961 is a wasteful number, since it uses less digits than its factorization.

65291961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374 (or 367 counting only the distinct ones).

The product of its digits is 29160, while the sum is 39.

The square root of 65291961 is about 8080.3441139595. The cubic root of 65291961 is about 402.6736742631.

The spelling of 65291961 in words is "sixty-five million, two hundred ninety-one thousand, nine hundred sixty-one".