65416661455 has 4 divisors (see below), whose sum is σ = 78499993752. Its totient is φ = 52333329160.

The previous prime is 65416661447. The next prime is 65416661483. The reversal of 65416661455 is 55416661456.

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

It is not a de Polignac number, because 65416661455 - 2³ = 65416661447 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 65416661399 and 65416661408.

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, 6541666141 + ... + 6541666150.

It is an arithmetic number, because the mean of its divisors is an integer number (19624998438).

Almost surely, 2^65416661455 is an apocalyptic number.

65416661455 is a deficient number, since it is larger than the sum of its proper divisors (13083332297).

65416661455 is a wasteful number, since it uses less digits than its factorization.

65416661455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13083332296.

The product of its digits is 2592000, while the sum is 49.

Subtracting from 65416661455 its reverse (55416661456), we obtain a palindrome (9999999999).

The spelling of 65416661455 in words is "sixty-five billion, four hundred sixteen million, six hundred sixty-one thousand, four hundred fifty-five".