65331563777 has 4 divisors (see below), whose sum is σ = 65336564400. Its totient is φ = 65326563156.

The previous prime is 65331563767. The next prime is 65331563809. The reversal of 65331563777 is 77736513356.

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 65331563777 - 2⁴ = 65331563761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65331563767) 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, 2480663 + ... + 2506860.

It is an arithmetic number, because the mean of its divisors is an integer number (16334141100).

Almost surely, 2^65331563777 is an apocalyptic number.

It is an amenable number.

65331563777 is a deficient number, since it is larger than the sum of its proper divisors (5000623).

65331563777 is a wasteful number, since it uses less digits than its factorization.

65331563777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5000622.

The product of its digits is 8334900, while the sum is 53.

The spelling of 65331563777 in words is "sixty-five billion, three hundred thirty-one million, five hundred sixty-three thousand, seven hundred seventy-seven".