7766666758345 has 16 divisors (see below), whose sum is σ = 10415255114880. Its totient is φ = 5510716988800.

The previous prime is 7766666758307. The next prime is 7766666758399. The reversal of 7766666758345 is 5438576666677.

It is not a de Polignac number, because 7766666758345 - 2¹⁹ = 7766666234057 is a prime.

It is a super-2 number, since 2×7766666758345² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1722096805 + ... + 1722101314.

It is an arithmetic number, because the mean of its divisors is an integer number (650953444680).

Almost surely, 2^{7766666758345} is an apocalyptic number.

It is an amenable number.

7766666758345 is a deficient number, since it is larger than the sum of its proper divisors (2648588356535).

7766666758345 is a wasteful number, since it uses less digits than its factorization.

7766666758345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3444198176.

The product of its digits is 6401203200, while the sum is 76.

The spelling of 7766666758345 in words is "seven trillion, seven hundred sixty-six billion, six hundred sixty-six million, seven hundred fifty-eight thousand, three hundred forty-five".