8123762661 has 32 divisors (see below), whose sum is σ = 12738582528. Its totient is φ = 4507824960.

The previous prime is 8123762623. The next prime is 8123762677. The reversal of 8123762661 is 1662673218.

It is not a de Polignac number, because 8123762661 - 2⁶ = 8123762597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8123762161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 396376 + ... + 416366.

It is an arithmetic number, because the mean of its divisors is an integer number (398080704).

Almost surely, 2^8123762661 is an apocalyptic number.

It is an amenable number.

8123762661 is a deficient number, since it is larger than the sum of its proper divisors (4614819867).

8123762661 is a wasteful number, since it uses less digits than its factorization.

8123762661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20561.

The product of its digits is 145152, while the sum is 42.

The square root of 8123762661 is about 90131.9181034111. The cubic root of 8123762661 is about 2010.2608228155.

The spelling of 8123762661 in words is "eight billion, one hundred twenty-three million, seven hundred sixty-two thousand, six hundred sixty-one".