7811702820668 has 12 divisors (see below), whose sum is σ = 13695748849272. Its totient is φ = 3898631720880.

The previous prime is 7811702820667. The next prime is 7811702820689. The reversal of 7811702820668 is 8660282071187.

It is a super-2 number, since 2×7811702820668² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7811702820667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1804919930 + ... + 1804924257.

It is an arithmetic number, because the mean of its divisors is an integer number (1141312404106).

Almost surely, 2^{7811702820668} is an apocalyptic number.

It is an amenable number.

7811702820668 is a deficient number, since it is larger than the sum of its proper divisors (5884046028604).

7811702820668 is a wasteful number, since it uses less digits than its factorization.

7811702820668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3609844732 (or 3609844730 counting only the distinct ones).

The product of its (nonzero) digits is 3612672, while the sum is 56.

The spelling of 7811702820668 in words is "seven trillion, eight hundred eleven billion, seven hundred two million, eight hundred twenty thousand, six hundred sixty-eight".