65994997 has 4 divisors (see below), whose sum is σ = 66924576. Its totient is φ = 65065420.

The previous prime is 65994979. The next prime is 65995009. The reversal of 65994997 is 79949956.

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 a de Polignac number, because none of the positive numbers 2^k-65994997 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 (65994197) 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, 464683 + ... + 464824.

It is an arithmetic number, because the mean of its divisors is an integer number (16731144).

Almost surely, 2^65994997 is an apocalyptic number.

It is an amenable number.

65994997 is a deficient number, since it is larger than the sum of its proper divisors (929579).

65994997 is an equidigital number, since it uses as much as digits as its factorization.

65994997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 929578.

The product of its digits is 5511240, while the sum is 58.

The square root of 65994997 is about 8123.7304854359. The cubic root of 65994997 is about 404.1137905295.

The spelling of 65994997 in words is "sixty-five million, nine hundred ninety-four thousand, nine hundred ninety-seven".