65988297 has 16 divisors (see below), whose sum is σ = 97968960. Its totient is φ = 43898400.

The previous prime is 65988283. The next prime is 65988313. The reversal of 65988297 is 79288956.

It is a happy number.

It is not a de Polignac number, because 65988297 - 2⁴ = 65988281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65988257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11722 + ... + 16412.

It is an arithmetic number, because the mean of its divisors is an integer number (6123060).

Almost surely, 2^65988297 is an apocalyptic number.

It is an amenable number.

65988297 is a deficient number, since it is larger than the sum of its proper divisors (31980663).

65988297 is a wasteful number, since it uses less digits than its factorization.

65988297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5221 (or 5215 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 54.

The square root of 65988297 is about 8123.3181028444. The cubic root of 65988297 is about 404.1001144725.

The spelling of 65988297 in words is "sixty-five million, nine hundred eighty-eight thousand, two hundred ninety-seven".