806664994 has 8 divisors (see below), whose sum is σ = 1281173868. Its totient is φ = 379607040.

The previous prime is 806664983. The next prime is 806665003. The reversal of 806664994 is 499466608.

It can be written as a sum of positive squares in 2 ways, for example, as 804459769 + 2205225 = 28363^2 + 1485^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11862687 + ... + 11862754.

Almost surely, 2^806664994 is an apocalyptic number.

806664994 is a deficient number, since it is larger than the sum of its proper divisors (474508874).

806664994 is a wasteful number, since it uses less digits than its factorization.

806664994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23725460.

The product of its (nonzero) digits is 2239488, while the sum is 52.

The square root of 806664994 is about 28401.8484257627. The cubic root of 806664994 is about 930.8886538018. Note that the first 3 decimals are identical.

The spelling of 806664994 in words is "eight hundred six million, six hundred sixty-four thousand, nine hundred ninety-four".