65215070661 has 16 divisors (see below), whose sum is σ = 93787822016. Its totient is φ = 40069921536.

The previous prime is 65215070653. The next prime is 65215070663. The reversal of 65215070661 is 16607051256.

It is not a de Polignac number, because 65215070661 - 2³ = 65215070653 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65215070663) 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 15 ways as a sum of consecutive naturals, for example, 1275220 + ... + 1325373.

It is an arithmetic number, because the mean of its divisors is an integer number (5861738876).

Almost surely, 2^65215070661 is an apocalyptic number.

It is an amenable number.

65215070661 is a deficient number, since it is larger than the sum of its proper divisors (28572751355).

65215070661 is a wasteful number, since it uses less digits than its factorization.

65215070661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2601252.

The product of its (nonzero) digits is 75600, while the sum is 39.

The spelling of 65215070661 in words is "sixty-five billion, two hundred fifteen million, seventy thousand, six hundred sixty-one".