65265627721 has 8 divisors (see below), whose sum is σ = 74599521984. Its totient is φ = 55934291760.

The previous prime is 65265627683. The next prime is 65265627727. The reversal of 65265627721 is 12772656256.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 65265627721 - 2⁷ = 65265627593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65265627727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 584590 + ... + 687223.

It is an arithmetic number, because the mean of its divisors is an integer number (9324940248).

Almost surely, 2^65265627721 is an apocalyptic number.

It is an amenable number.

65265627721 is a deficient number, since it is larger than the sum of its proper divisors (9333894263).

65265627721 is a wasteful number, since it uses less digits than its factorization.

65265627721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1279151.

The product of its digits is 2116800, while the sum is 49.

The spelling of 65265627721 in words is "sixty-five billion, two hundred sixty-five million, six hundred twenty-seven thousand, seven hundred twenty-one".