268661977 has 2 divisors, whose sum is σ = 268661978. Its totient is φ = 268661976.

The previous prime is 268661951. The next prime is 268661993. The reversal of 268661977 is 779166862.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 268173376 + 488601 = 16376^2 + 699^2 .

It is a cyclic number.

It is not a de Polignac number, because 268661977 - 2²⁷ = 134444249 is a prime.

It is not a weakly prime, because it can be changed into another prime (268661947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134330988 + 134330989.

It is an arithmetic number, because the mean of its divisors is an integer number (134330989).

Almost surely, 2^268661977 is an apocalyptic number.

It is an amenable number.

268661977 is a deficient number, since it is larger than the sum of its proper divisors (1).

268661977 is an equidigital number, since it uses as much as digits as its factorization.

268661977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1524096, while the sum is 52.

The square root of 268661977 is about 16390.9114145614. The cubic root of 268661977 is about 645.2609780584.

The spelling of 268661977 in words is "two hundred sixty-eight million, six hundred sixty-one thousand, nine hundred seventy-seven".