772270071633661 has 4 divisors (see below), whose sum is σ = 772270262977824. Its totient is φ = 772269880289500.

The previous prime is 772270071633653. The next prime is 772270071633677. The reversal of 772270071633661 is 166336170072277.

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 772270071633661 - 2³ = 772270071633653 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 772270071633596 and 772270071633605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (772270071633601) 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, 89484655 + ... + 97734556.

It is an arithmetic number, because the mean of its divisors is an integer number (193067565744456).

Almost surely, 2^{772270071633661} is an apocalyptic number.

It is an amenable number.

772270071633661 is a deficient number, since it is larger than the sum of its proper divisors (191344163).

772270071633661 is a wasteful number, since it uses less digits than its factorization.

772270071633661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191344162.

The product of its (nonzero) digits is 18670176, while the sum is 58.

The spelling of 772270071633661 in words is "seven hundred seventy-two trillion, two hundred seventy billion, seventy-one million, six hundred thirty-three thousand, six hundred sixty-one".