275164661 has 2 divisors, whose sum is σ = 275164662. Its totient is φ = 275164660.

The previous prime is 275164657. The next prime is 275164679. The reversal of 275164661 is 166461572.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 267976900 + 7187761 = 16370^2 + 2681^2 .

It is a cyclic number.

It is not a de Polignac number, because 275164661 - 2² = 275164657 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (275164651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137582330 + 137582331.

It is an arithmetic number, because the mean of its divisors is an integer number (137582331).

Almost surely, 2^275164661 is an apocalyptic number.

It is an amenable number.

275164661 is a deficient number, since it is larger than the sum of its proper divisors (1).

275164661 is an equidigital number, since it uses as much as digits as its factorization.

275164661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 38.

The square root of 275164661 is about 16588.0879247730. The cubic root of 275164661 is about 650.4254894615.

The spelling of 275164661 in words is "two hundred seventy-five million, one hundred sixty-four thousand, six hundred sixty-one".