7766421700765 has 64 divisors (see below), whose sum is σ = 11761274359296. Its totient is φ = 4792413330432.

The previous prime is 7766421700717. The next prime is 7766421700783. The reversal of 7766421700765 is 5670071246677.

It is not a de Polignac number, because 7766421700765 - 2¹³ = 7766421692573 is a prime.

It is a super-2 number, since 2×7766421700765² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2760394 + ... + 4811716.

It is an arithmetic number, because the mean of its divisors is an integer number (183769911864).

Almost surely, 2^{7766421700765} is an apocalyptic number.

It is an amenable number.

7766421700765 is a deficient number, since it is larger than the sum of its proper divisors (3994852658531).

7766421700765 is a wasteful number, since it uses less digits than its factorization.

7766421700765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2051558.

The product of its (nonzero) digits is 20744640, while the sum is 58.

The spelling of 7766421700765 in words is "seven trillion, seven hundred sixty-six billion, four hundred twenty-one million, seven hundred thousand, seven hundred sixty-five".