9127994661 has 6 divisors (see below), whose sum is σ = 13184881190. Its totient is φ = 6085329768.

The previous prime is 9127994657. The next prime is 9127994663. The reversal of 9127994661 is 1664997219.

It is a happy number.

9127994661 is a `hidden beast` number, since 91 + 2 + 7 + 99 + 466 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 7884374436 + 1243620225 = 88794^2 + 35265^2 .

It is not a de Polignac number, because 9127994661 - 2² = 9127994657 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9127994598 and 9127994607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9127994663) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 507110806 + ... + 507110823.

Almost surely, 2^9127994661 is an apocalyptic number.

It is an amenable number.

9127994661 is a deficient number, since it is larger than the sum of its proper divisors (4056886529).

9127994661 is a wasteful number, since it uses less digits than its factorization.

9127994661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1014221635 (or 1014221632 counting only the distinct ones).

The product of its digits is 1469664, while the sum is 54.

The square root of 9127994661 is about 95540.5393589548. The cubic root of 9127994661 is about 2089.8981705231.

The spelling of 9127994661 in words is "nine billion, one hundred twenty-seven million, nine hundred ninety-four thousand, six hundred sixty-one".