4491666761 has 4 divisors (see below), whose sum is σ = 4545783312. Its totient is φ = 4437550212.

The previous prime is 4491666733. The next prime is 4491666799. The reversal of 4491666761 is 1676661944.

4491666761 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4491666761 is a prime.

It is a super-2 number, since 2×4491666761² = 40350140583744462242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4491666961) 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, 27058151 + ... + 27058316.

It is an arithmetic number, because the mean of its divisors is an integer number (1136445828).

Almost surely, 2^4491666761 is an apocalyptic number.

It is an amenable number.

4491666761 is a deficient number, since it is larger than the sum of its proper divisors (54116551).

4491666761 is an equidigital number, since it uses as much as digits as its factorization.

4491666761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54116550.

The product of its digits is 1306368, while the sum is 50.

The square root of 4491666761 is about 67019.8982467148. The cubic root of 4491666761 is about 1649.9438929192.

The spelling of 4491666761 in words is "four billion, four hundred ninety-one million, six hundred sixty-six thousand, seven hundred sixty-one".