65963997 has 48 divisors (see below), whose sum is σ = 109506880. Its totient is φ = 39204000.

The previous prime is 65963987. The next prime is 65963999. The reversal of 65963997 is 79936956.

It is not a de Polignac number, because 65963997 - 2⁸ = 65963741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65963999) 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, 199122 + ... + 199452.

Almost surely, 2^65963997 is an apocalyptic number.

It is an amenable number.

65963997 is a deficient number, since it is larger than the sum of its proper divisors (43542883).

65963997 is a wasteful number, since it uses less digits than its factorization.

65963997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423 (or 406 counting only the distinct ones).

The product of its digits is 2755620, while the sum is 54.

The square root of 65963997 is about 8121.8222708946. The cubic root of 65963997 is about 404.0505054821.

The spelling of 65963997 in words is "sixty-five million, nine hundred sixty-three thousand, nine hundred ninety-seven".