85266761 has 2 divisors, whose sum is σ = 85266762. Its totient is φ = 85266760.

The previous prime is 85266743. The next prime is 85266763. The reversal of 85266761 is 16766258.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62647225 + 22619536 = 7915^2 + 4756^2 .

It is a cyclic number.

It is not a de Polignac number, because 85266761 - 2⁶ = 85266697 is a prime.

It is a super-2 number, since 2×85266761² = 14540841062862242, which contains 22 as substring.

Together with 85266763, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (85266763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42633380 + 42633381.

It is an arithmetic number, because the mean of its divisors is an integer number (42633381).

Almost surely, 2^85266761 is an apocalyptic number.

It is an amenable number.

85266761 is a deficient number, since it is larger than the sum of its proper divisors (1).

85266761 is an equidigital number, since it uses as much as digits as its factorization.

85266761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 41.

The square root of 85266761 is about 9234.0002707386. Note that the first 3 decimals coincide. The cubic root of 85266761 is about 440.1424487124.

The spelling of 85266761 in words is "eighty-five million, two hundred sixty-six thousand, seven hundred sixty-one".