786670057081 has 2 divisors, whose sum is σ = 786670057082. Its totient is φ = 786670057080.

The previous prime is 786670057051. The next prime is 786670057087. The reversal of 786670057081 is 180750076687.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 728436645225 + 58233411856 = 853485^2 + 241316^2 .

It is a cyclic number.

It is not a de Polignac number, because 786670057081 - 2⁹ = 786670056569 is a prime.

It is a super-2 number, since 2×786670057081² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (786670057087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 393335028540 + 393335028541.

It is an arithmetic number, because the mean of its divisors is an integer number (393335028541).

Almost surely, 2^786670057081 is an apocalyptic number.

It is an amenable number.

786670057081 is a deficient number, since it is larger than the sum of its proper divisors (1).

786670057081 is an equidigital number, since it uses as much as digits as its factorization.

786670057081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3951360, while the sum is 55.

The spelling of 786670057081 in words is "seven hundred eighty-six billion, six hundred seventy million, fifty-seven thousand, eighty-one".