766685644234 has 4 divisors (see below), whose sum is σ = 1150028466354. Its totient is φ = 383342822116.

The previous prime is 766685644213. The next prime is 766685644253. The reversal of 766685644234 is 432446586667.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 432446586667 = 19889 ⋅21743003.

It can be written as a sum of positive squares in only one way, i.e., 703057095225 + 63628549009 = 838485^2 + 252247^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 191671411057 + ... + 191671411060.

Almost surely, 2^766685644234 is an apocalyptic number.

766685644234 is a deficient number, since it is larger than the sum of its proper divisors (383342822120).

766685644234 is a wasteful number, since it uses less digits than its factorization.

766685644234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383342822119.

The product of its digits is 139345920, while the sum is 61.

The spelling of 766685644234 in words is "seven hundred sixty-six billion, six hundred eighty-five million, six hundred forty-four thousand, two hundred thirty-four".