662627861209 has 2 divisors, whose sum is σ = 662627861210. Its totient is φ = 662627861208.

The previous prime is 662627861171. The next prime is 662627861213. The reversal of 662627861209 is 902168726266.

662627861209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 616308212809 + 46319648400 = 785053^2 + 215220^2 .

It is a cyclic number.

It is not a de Polignac number, because 662627861209 - 2¹⁵ = 662627828441 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 662627861209.

It is not a weakly prime, because it can be changed into another prime (662627861219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331313930604 + 331313930605.

It is an arithmetic number, because the mean of its divisors is an integer number (331313930605).

Almost surely, 2^662627861209 is an apocalyptic number.

It is an amenable number.

662627861209 is a deficient number, since it is larger than the sum of its proper divisors (1).

662627861209 is an equidigital number, since it uses as much as digits as its factorization.

662627861209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5225472, while the sum is 55.

The spelling of 662627861209 in words is "six hundred sixty-two billion, six hundred twenty-seven million, eight hundred sixty-one thousand, two hundred nine".