261752663 has 2 divisors, whose sum is σ = 261752664. Its totient is φ = 261752662.

The previous prime is 261752629. The next prime is 261752671. The reversal of 261752663 is 366257162.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 261752663 - 2⁶ = 261752599 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (261752693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130876331 + 130876332.

It is an arithmetic number, because the mean of its divisors is an integer number (130876332).

Almost surely, 2^261752663 is an apocalyptic number.

261752663 is a deficient number, since it is larger than the sum of its proper divisors (1).

261752663 is an equidigital number, since it uses as much as digits as its factorization.

261752663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 38.

The square root of 261752663 is about 16178.7719867733. The cubic root of 261752663 is about 639.6813705280.

The spelling of 261752663 in words is "two hundred sixty-one million, seven hundred fifty-two thousand, six hundred sixty-three".