766666633 has 2 divisors, whose sum is σ = 766666634. Its totient is φ = 766666632.

The previous prime is 766666597. The next prime is 766666669. The reversal of 766666633 is 336666667.

It is a balanced prime because it is at equal distance from previous prime (766666597) and next prime (766666669).

It can be written as a sum of positive squares in only one way, i.e., 763803769 + 2862864 = 27637^2 + 1692^2 .

It is a cyclic number.

It is not a de Polignac number, because 766666633 - 2²⁵ = 733112201 is a prime.

It is a nialpdrome in base 10.

It is not a weakly prime, because it can be changed into another prime (766666333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 383333316 + 383333317.

It is an arithmetic number, because the mean of its divisors is an integer number (383333317).

Almost surely, 2^766666633 is an apocalyptic number.

It is an amenable number.

766666633 is a deficient number, since it is larger than the sum of its proper divisors (1).

766666633 is an equidigital number, since it uses as much as digits as its factorization.

766666633 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2939328, while the sum is 49.

The square root of 766666633 is about 27688.7456017784. The cubic root of 766666633 is about 915.2411133620.

The spelling of 766666633 in words is "seven hundred sixty-six million, six hundred sixty-six thousand, six hundred thirty-three".