8911907661 has 4 divisors (see below), whose sum is σ = 11882543552. Its totient is φ = 5941271772.

The previous prime is 8911907617. The next prime is 8911907663. The reversal of 8911907661 is 1667091198.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 8911907661 - 2⁶ = 8911907597 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8911907661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8911907663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1485317941 + ... + 1485317946.

It is an arithmetic number, because the mean of its divisors is an integer number (2970635888).

Almost surely, 2^8911907661 is an apocalyptic number.

It is an amenable number.

8911907661 is a deficient number, since it is larger than the sum of its proper divisors (2970635891).

8911907661 is a wasteful number, since it uses less digits than its factorization.

8911907661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2970635890.

The product of its (nonzero) digits is 163296, while the sum is 48.

The square root of 8911907661 is about 94402.9007022560. The cubic root of 8911907661 is about 2073.2749129335.

The spelling of 8911907661 in words is "eight billion, nine hundred eleven million, nine hundred seven thousand, six hundred sixty-one".