65676667655 has 4 divisors (see below), whose sum is σ = 78812001192. Its totient is φ = 52541334120.

The previous prime is 65676667643. The next prime is 65676667687. The reversal of 65676667655 is 55676667656.

65676667655 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.

It is a de Polignac number, because none of the positive numbers 2^k-65676667655 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 65676667591 and 65676667600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6567666761 + ... + 6567666770.

It is an arithmetic number, because the mean of its divisors is an integer number (19703000298).

Almost surely, 2^65676667655 is an apocalyptic number.

65676667655 is a deficient number, since it is larger than the sum of its proper divisors (13135333537).

65676667655 is a wasteful number, since it uses less digits than its factorization.

65676667655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13135333536.

The product of its digits is 285768000, while the sum is 65.

Subtracting from 65676667655 its reverse (55676667656), we obtain a palindrome (9999999999).

The spelling of 65676667655 in words is "sixty-five billion, six hundred seventy-six million, six hundred sixty-seven thousand, six hundred fifty-five".