670075772021 has 2 divisors, whose sum is σ = 670075772022. Its totient is φ = 670075772020.

The previous prime is 670075772017. The next prime is 670075772053. The reversal of 670075772021 is 120277570076.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 633321514225 + 36754257796 = 795815^2 + 191714^2 .

It is a cyclic number.

It is not a de Polignac number, because 670075772021 - 2² = 670075772017 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (670075772071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335037886010 + 335037886011.

It is an arithmetic number, because the mean of its divisors is an integer number (335037886011).

Almost surely, 2^670075772021 is an apocalyptic number.

It is an amenable number.

670075772021 is a deficient number, since it is larger than the sum of its proper divisors (1).

670075772021 is an equidigital number, since it uses as much as digits as its factorization.

670075772021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288120, while the sum is 44.

The spelling of 670075772021 in words is "six hundred seventy billion, seventy-five million, seven hundred seventy-two thousand, twenty-one".