991345466 has 16 divisors (see below), whose sum is σ = 1539952128. Its totient is φ = 478131600.

The previous prime is 991345447. The next prime is 991345489. The reversal of 991345466 is 664543199.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 991345466.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6425 + ... + 44988.

It is an arithmetic number, because the mean of its divisors is an integer number (96247008).

Almost surely, 2^991345466 is an apocalyptic number.

991345466 is a deficient number, since it is larger than the sum of its proper divisors (548606662).

991345466 is a wasteful number, since it uses less digits than its factorization.

991345466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51757.

The product of its digits is 699840, while the sum is 47.

The square root of 991345466 is about 31485.6390438562. The cubic root of 991345466 is about 997.1067927579.

The spelling of 991345466 in words is "nine hundred ninety-one million, three hundred forty-five thousand, four hundred sixty-six".