7516665756666 has 48 divisors (see below), whose sum is σ = 17779661984448. Its totient is φ = 2276111160000.

The previous prime is 7516665756643. The next prime is 7516665756679. The reversal of 7516665756666 is 6666575666157.

It is a junction number, because it is equal to n+sod(n) for n = 7516665756594 and 7516665756603.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13614835 + ... + 14156166.

It is an arithmetic number, because the mean of its divisors is an integer number (370409624676).

Almost surely, 2^{7516665756666} is an apocalyptic number.

7516665756666 is an abundant number, since it is smaller than the sum of its proper divisors (10262996227782).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7516665756666 is a wasteful number, since it uses less digits than its factorization.

7516665756666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27772387 (or 27772384 counting only the distinct ones).

The product of its digits is 1714608000, while the sum is 72.

The spelling of 7516665756666 in words is "seven trillion, five hundred sixteen billion, six hundred sixty-five million, seven hundred fifty-six thousand, six hundred sixty-six".