7666872381 has 48 divisors (see below), whose sum is σ = 14106268800. Its totient is φ = 3906330624.

The previous prime is 7666872359. The next prime is 7666872407. The reversal of 7666872381 is 1832786667.

It is not a de Polignac number, because 7666872381 - 2¹⁰ = 7666871357 is a prime.

It is a super-2 number, since 2×7666872381² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7666872581) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 168036 + ... + 208733.

It is an arithmetic number, because the mean of its divisors is an integer number (293880600).

Almost surely, 2^7666872381 is an apocalyptic number.

It is an amenable number.

7666872381 is a deficient number, since it is larger than the sum of its proper divisors (6439396419).

7666872381 is a wasteful number, since it uses less digits than its factorization.

7666872381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376818 (or 376815 counting only the distinct ones).

The product of its digits is 4064256, while the sum is 54.

The square root of 7666872381 is about 87560.6782808356. The cubic root of 7666872381 is about 1971.8448692986.

The spelling of 7666872381 in words is "seven billion, six hundred sixty-six million, eight hundred seventy-two thousand, three hundred eighty-one".