7664461885 has 8 divisors (see below), whose sum is σ = 9197988696. Its totient is φ = 6131146560.

The previous prime is 7664461877. The next prime is 7664461897. The reversal of 7664461885 is 5881644667.

It can be written as a sum of positive squares in 4 ways, for example, as 1353430521 + 6311031364 = 36789^2 + 79442^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7664461885 - 2³ = 7664461877 is a prime.

It is a Duffinian number.

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 7 ways as a sum of consecutive naturals, for example, 42507 + ... + 130903.

It is an arithmetic number, because the mean of its divisors is an integer number (1149748587).

Almost surely, 2^7664461885 is an apocalyptic number.

It is an amenable number.

7664461885 is a deficient number, since it is larger than the sum of its proper divisors (1533526811).

7664461885 is a wasteful number, since it uses less digits than its factorization.

7664461885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105743.

The product of its digits is 7741440, while the sum is 55.

The square root of 7664461885 is about 87546.9124812520. The cubic root of 7664461885 is about 1971.6381956098.

The spelling of 7664461885 in words is "seven billion, six hundred sixty-four million, four hundred sixty-one thousand, eight hundred eighty-five".