4591199666 has 4 divisors (see below), whose sum is σ = 6886799502. Its totient is φ = 2295599832.

The previous prime is 4591199617. The next prime is 4591199687. The reversal of 4591199666 is 6669911954.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 4386280441 + 204919225 = 66229^2 + 14315^2 .

It is a super-2 number, since 2×4591199666² = 42158228746157023112, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1147799915 + ... + 1147799918.

Almost surely, 2^4591199666 is an apocalyptic number.

4591199666 is a deficient number, since it is larger than the sum of its proper divisors (2295599836).

4591199666 is a wasteful number, since it uses less digits than its factorization.

4591199666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2295599835.

The product of its digits is 3149280, while the sum is 56.

The square root of 4591199666 is about 67758.3918492758. The cubic root of 4591199666 is about 1662.0422517705.

The spelling of 4591199666 in words is "four billion, five hundred ninety-one million, one hundred ninety-nine thousand, six hundred sixty-six".