7826666964 has 24 divisors (see below), whose sum is σ = 19056233280. Its totient is φ = 2495458944.

The previous prime is 7826666959. The next prime is 7826666977. The reversal of 7826666964 is 4696666287.

It is a super-2 number, since 2×7826666964² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7826666898 and 7826666907.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14178469 + ... + 14179020.

It is an arithmetic number, because the mean of its divisors is an integer number (794009720).

Almost surely, 2^7826666964 is an apocalyptic number.

It is an amenable number.

7826666964 is an abundant number, since it is smaller than the sum of its proper divisors (11229566316).

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

7826666964 is a wasteful number, since it uses less digits than its factorization.

7826666964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28357519 (or 28357517 counting only the distinct ones).

The product of its digits is 31352832, while the sum is 60.

The square root of 7826666964 is about 88468.4518006278. The cubic root of 7826666964 is about 1985.4499855633.

The spelling of 7826666964 in words is "seven billion, eight hundred twenty-six million, six hundred sixty-six thousand, nine hundred sixty-four".