426660616957 has 2 divisors, whose sum is σ = 426660616958. Its totient is φ = 426660616956.

The previous prime is 426660616939. The next prime is 426660616981. The reversal of 426660616957 is 759616066624.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 360184823716 + 66475793241 = 600154^2 + 257829^2 .

It is a cyclic number.

It is not a de Polignac number, because 426660616957 - 2²³ = 426652228349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (426660616997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213330308478 + 213330308479.

It is an arithmetic number, because the mean of its divisors is an integer number (213330308479).

Almost surely, 2^426660616957 is an apocalyptic number.

It is an amenable number.

426660616957 is a deficient number, since it is larger than the sum of its proper divisors (1).

426660616957 is an equidigital number, since it uses as much as digits as its factorization.

426660616957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19595520, while the sum is 58.

The spelling of 426660616957 in words is "four hundred twenty-six billion, six hundred sixty million, six hundred sixteen thousand, nine hundred fifty-seven".