766126891 has 2 divisors, whose sum is σ = 766126892. Its totient is φ = 766126890.

The previous prime is 766126841. The next prime is 766126903. The reversal of 766126891 is 198621667.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 766126891 - 2⁷ = 766126763 is a prime.

It is a super-2 number, since 2×766126891² = 1173900826226651762, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (766126841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 383063445 + 383063446.

It is an arithmetic number, because the mean of its divisors is an integer number (383063446).

Almost surely, 2^766126891 is an apocalyptic number.

766126891 is a deficient number, since it is larger than the sum of its proper divisors (1).

766126891 is an equidigital number, since it uses as much as digits as its factorization.

766126891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 46.

The square root of 766126891 is about 27678.9972903644. The cubic root of 766126891 is about 915.0262829004.

The spelling of 766126891 in words is "seven hundred sixty-six million, one hundred twenty-six thousand, eight hundred ninety-one".