766870215701 has 2 divisors, whose sum is σ = 766870215702. Its totient is φ = 766870215700.

The previous prime is 766870215673. The next prime is 766870215707. The reversal of 766870215701 is 107512078667.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 441160311601 + 325709904100 = 664199^2 + 570710^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-766870215701 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 766870215701.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (766870215707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 383435107850 + 383435107851.

It is an arithmetic number, because the mean of its divisors is an integer number (383435107851).

Almost surely, 2^766870215701 is an apocalyptic number.

It is an amenable number.

766870215701 is a deficient number, since it is larger than the sum of its proper divisors (1).

766870215701 is an equidigital number, since it uses as much as digits as its factorization.

766870215701 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 987840, while the sum is 50.

The spelling of 766870215701 in words is "seven hundred sixty-six billion, eight hundred seventy million, two hundred fifteen thousand, seven hundred one".