766666689999999 has 48 divisors (see below), whose sum is σ = 1043664918912000. Its totient is φ = 500605541083648.

The previous prime is 766666689999983. The next prime is 766666690000009. The reversal of 766666689999999 is 999999986666667.

It is not a de Polignac number, because 766666689999999 - 2⁴ = 766666689999983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (766666689959999) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 35813820754 + ... + 35813842160.

It is an arithmetic number, because the mean of its divisors is an integer number (21743019144000).

Almost surely, 2^{766666689999999} is an apocalyptic number.

766666689999999 is a deficient number, since it is larger than the sum of its proper divisors (276998228912001).

766666689999999 is a wasteful number, since it uses less digits than its factorization.

766666689999999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28624 (or 28571 counting only the distinct ones).

The product of its digits is 12496635293184, while the sum is 114.

The spelling of 766666689999999 in words is "seven hundred sixty-six trillion, six hundred sixty-six billion, six hundred eighty-nine million, nine hundred ninety-nine thousand, nine hundred ninety-nine".