679425027661 has 2 divisors, whose sum is σ = 679425027662. Its totient is φ = 679425027660.

The previous prime is 679425027637. The next prime is 679425027707. The reversal of 679425027661 is 166720524976.

679425027661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 632511633636 + 46913394025 = 795306^2 + 216595^2 .

It is a cyclic number.

It is not a de Polignac number, because 679425027661 - 2²³ = 679416639053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (679425027361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339712513830 + 339712513831.

It is an arithmetic number, because the mean of its divisors is an integer number (339712513831).

Almost surely, 2^679425027661 is an apocalyptic number.

It is an amenable number.

679425027661 is a deficient number, since it is larger than the sum of its proper divisors (1).

679425027661 is an equidigital number, since it uses as much as digits as its factorization.

679425027661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7620480, while the sum is 55.

The spelling of 679425027661 in words is "six hundred seventy-nine billion, four hundred twenty-five million, twenty-seven thousand, six hundred sixty-one".