65976397 has 4 divisors (see below), whose sum is σ = 68844960. Its totient is φ = 63107836.

The previous prime is 65976389. The next prime is 65976413. The reversal of 65976397 is 79367956.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 65976397 - 2³ = 65976389 is a prime.

It is a super-2 number, since 2×65976397² = 8705769922203218, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65976347) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1434247 + ... + 1434292.

It is an arithmetic number, because the mean of its divisors is an integer number (17211240).

Almost surely, 2^65976397 is an apocalyptic number.

It is an amenable number.

65976397 is a deficient number, since it is larger than the sum of its proper divisors (2868563).

65976397 is a wasteful number, since it uses less digits than its factorization.

65976397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2868562.

The product of its digits is 2143260, while the sum is 52.

The square root of 65976397 is about 8122.5856105061. The cubic root of 65976397 is about 404.0758218799.

The spelling of 65976397 in words is "sixty-five million, nine hundred seventy-six thousand, three hundred ninety-seven".