306890666 has 8 divisors (see below), whose sum is σ = 460570944. Its totient is φ = 153367020.

The previous prime is 306890657. The next prime is 306890729. The reversal of 306890666 is 666098603.

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, 34130 + ... + 42173.

It is an arithmetic number, because the mean of its divisors is an integer number (57571368).

Almost surely, 2^306890666 is an apocalyptic number.

306890666 is a deficient number, since it is larger than the sum of its proper divisors (153680278).

306890666 is a wasteful number, since it uses less digits than its factorization.

306890666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78316.

The product of its (nonzero) digits is 279936, while the sum is 44.

The square root of 306890666 is about 17518.2951796115. The cubic root of 306890666 is about 674.5195784040.

The spelling of 306890666 in words is "three hundred six million, eight hundred ninety thousand, six hundred sixty-six".