7826666965 has 16 divisors (see below), whose sum is σ = 10158649200. Its totient is φ = 5754442752.

The previous prime is 7826666959. The next prime is 7826666977. The reversal of 7826666965 is 5696666287.

It can be written as a sum of positive squares in 8 ways, for example, as 89529444 + 7737137521 = 9462^2 + 87961^2 .

It is a cyclic number.

It is not a de Polignac number, because 7826666965 - 2⁹ = 7826666453 is a prime.

It is a super-2 number, since 2×7826666965² (a number of 21 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 15 ways as a sum of consecutive naturals, for example, 248020 + ... + 277789.

It is an arithmetic number, because the mean of its divisors is an integer number (634915575).

Almost surely, 2^7826666965 is an apocalyptic number.

It is an amenable number.

7826666965 is a deficient number, since it is larger than the sum of its proper divisors (2331982235).

7826666965 is a wasteful number, since it uses less digits than its factorization.

7826666965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526056.

The product of its digits is 39191040, while the sum is 61.

The square root of 7826666965 is about 88468.4518062795. The cubic root of 7826666965 is about 1985.4499856479.

The spelling of 7826666965 in words is "seven billion, eight hundred twenty-six million, six hundred sixty-six thousand, nine hundred sixty-five".