7666750342391 has 16 divisors (see below), whose sum is σ = 8765898435840. Its totient is φ = 6568577305920.

The previous prime is 7666750342387. The next prime is 7666750342409. The reversal of 7666750342391 is 1932430576667.

It is not a de Polignac number, because 7666750342391 - 2² = 7666750342387 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7666750342391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7666750342351) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 248574131 + ... + 248604971.

It is an arithmetic number, because the mean of its divisors is an integer number (547868652240).

Almost surely, 2^{7666750342391} is an apocalyptic number.

7666750342391 is a deficient number, since it is larger than the sum of its proper divisors (1099148093449).

7666750342391 is a wasteful number, since it uses less digits than its factorization.

7666750342391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45494.

The product of its (nonzero) digits is 34292160, while the sum is 59.

The spelling of 7666750342391 in words is "seven trillion, six hundred sixty-six billion, seven hundred fifty million, three hundred forty-two thousand, three hundred ninety-one".