65557963927 has 4 divisors (see below), whose sum is σ = 65563241656. Its totient is φ = 65552686200.

The previous prime is 65557963909. The next prime is 65557963937. The reversal of 65557963927 is 72936975556.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 65557963927 - 2⁷ = 65557963799 is a prime.

It is a super-2 number, since 2×65557963927² (a number of 22 digits) 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 (65557963937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2620188 + ... + 2645089.

It is an arithmetic number, because the mean of its divisors is an integer number (16390810414).

Almost surely, 2^65557963927 is an apocalyptic number.

65557963927 is a deficient number, since it is larger than the sum of its proper divisors (5277729).

65557963927 is a wasteful number, since it uses less digits than its factorization.

65557963927 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5277728.

The product of its digits is 107163000, while the sum is 64.

The spelling of 65557963927 in words is "sixty-five billion, five hundred fifty-seven million, nine hundred sixty-three thousand, nine hundred twenty-seven".