766666690000009 has 2 divisors, whose sum is σ = 766666690000010. Its totient is φ = 766666690000008.

The previous prime is 766666689999983. The next prime is 766666690000033. The reversal of 766666690000009 is 900000096666667.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 722304056761225 + 44362633238784 = 26875715^2 + 6660528^2 .

It is a cyclic number.

It is not a de Polignac number, because 766666690000009 - 2¹³ = 766666689991817 is a prime.

It is not a weakly prime, because it can be changed into another prime (766666690000069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 383333345000004 + 383333345000005.

It is an arithmetic number, because the mean of its divisors is an integer number (383333345000005).

Almost surely, 2^{766666690000009} is an apocalyptic number.

It is an amenable number.

766666690000009 is a deficient number, since it is larger than the sum of its proper divisors (1).

766666690000009 is an equidigital number, since it uses as much as digits as its factorization.

766666690000009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26453952, while the sum is 61.

The spelling of 766666690000009 in words is "seven hundred sixty-six trillion, six hundred sixty-six billion, six hundred ninety million, nine", and thus it is an aban number.