65994859553 has 4 divisors (see below), whose sum is σ = 75422696640. Its totient is φ = 56567022468.

The previous prime is 65994859517. The next prime is 65994859573. The reversal of 65994859553 is 35595849956.

65994859553 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 65994859553 - 2¹⁰ = 65994858529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65994859573) 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, 4713918533 + ... + 4713918546.

It is an arithmetic number, because the mean of its divisors is an integer number (18855674160).

Almost surely, 2^65994859553 is an apocalyptic number.

It is an amenable number.

65994859553 is a deficient number, since it is larger than the sum of its proper divisors (9427837087).

65994859553 is an equidigital number, since it uses as much as digits as its factorization.

65994859553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9427837086.

The product of its digits is 262440000, while the sum is 68.

The spelling of 65994859553 in words is "sixty-five billion, nine hundred ninety-four million, eight hundred fifty-nine thousand, five hundred fifty-three".