766222261 has 12 divisors (see below), whose sum is σ = 891950592. Its totient is φ = 656297208.

The previous prime is 766222243. The next prime is 766222277. The reversal of 766222261 is 162222667.

It is not a de Polignac number, because 766222261 - 2⁵ = 766222229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (766222201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 76786 + ... + 86188.

It is an arithmetic number, because the mean of its divisors is an integer number (74329216).

Almost surely, 2^766222261 is an apocalyptic number.

It is an amenable number.

766222261 is a deficient number, since it is larger than the sum of its proper divisors (125728331).

766222261 is a wasteful number, since it uses less digits than its factorization.

766222261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11080 (or 11073 counting only the distinct ones).

The product of its digits is 24192, while the sum is 34.

The square root of 766222261 is about 27680.7200231497. The cubic root of 766222261 is about 915.0642498206.

The spelling of 766222261 in words is "seven hundred sixty-six million, two hundred twenty-two thousand, two hundred sixty-one".