65667599953 has 4 divisors (see below), whose sum is σ = 65680998208. Its totient is φ = 65654201700.

The previous prime is 65667599951. The next prime is 65667599981. The reversal of 65667599953 is 35999576656.

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 65667599953 - 2¹ = 65667599951 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65667599951) 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, 6691773 + ... + 6701578.

It is an arithmetic number, because the mean of its divisors is an integer number (16420249552).

Almost surely, 2^65667599953 is an apocalyptic number.

It is an amenable number.

65667599953 is a deficient number, since it is larger than the sum of its proper divisors (13398255).

65667599953 is a wasteful number, since it uses less digits than its factorization.

65667599953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13398254.

The product of its digits is 413343000, while the sum is 70.

The spelling of 65667599953 in words is "sixty-five billion, six hundred sixty-seven million, five hundred ninety-nine thousand, nine hundred fifty-three".