766666689959999 has 2 divisors, whose sum is σ = 766666689960000. Its totient is φ = 766666689959998.

The previous prime is 766666689959983. The next prime is 766666689960167. The reversal of 766666689959999 is 999959986666667.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 766666689959999 - 2⁴ = 766666689959983 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 766666689959999.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (766666689959299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 383333344979999 + 383333344980000.

It is an arithmetic number, because the mean of its divisors is an integer number (383333344980000).

Almost surely, 2^{766666689959999} is an apocalyptic number.

766666689959999 is a deficient number, since it is larger than the sum of its proper divisors (1).

766666689959999 is an equidigital number, since it uses as much as digits as its factorization.

766666689959999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6942575162880, while the sum is 110.

The spelling of 766666689959999 in words is "seven hundred sixty-six trillion, six hundred sixty-six billion, six hundred eighty-nine million, nine hundred fifty-nine thousand, nine hundred ninety-nine".