663879157 has 2 divisors, whose sum is σ = 663879158. Its totient is φ = 663879156.

The previous prime is 663879149. The next prime is 663879233. The reversal of 663879157 is 751978366.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 446434641 + 217444516 = 21129^2 + 14746^2 .

It is a cyclic number.

It is not a de Polignac number, because 663879157 - 2³ = 663879149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (663879457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331939578 + 331939579.

It is an arithmetic number, because the mean of its divisors is an integer number (331939579).

Almost surely, 2^663879157 is an apocalyptic number.

It is an amenable number.

663879157 is a deficient number, since it is larger than the sum of its proper divisors (1).

663879157 is an equidigital number, since it uses as much as digits as its factorization.

663879157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1905120, while the sum is 52.

The square root of 663879157 is about 25765.8525378067. The cubic root of 663879157 is about 872.3612068124.

The spelling of 663879157 in words is "six hundred sixty-three million, eight hundred seventy-nine thousand, one hundred fifty-seven".