851456666 has 8 divisors (see below), whose sum is σ = 1298122644. Its totient is φ = 418749120.

The previous prime is 851456663. The next prime is 851456689. The reversal of 851456666 is 666654158.

It can be written as a sum of positive squares in 2 ways, for example, as 661981441 + 189475225 = 25729^2 + 13765^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 851456666.

It is not an unprimeable number, because it can be changed into a prime (851456663) 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, 3489455 + ... + 3489698.

Almost surely, 2^851456666 is an apocalyptic number.

851456666 is a deficient number, since it is larger than the sum of its proper divisors (446665978).

851456666 is a wasteful number, since it uses less digits than its factorization.

851456666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6979216.

The product of its digits is 1036800, while the sum is 47.

The square root of 851456666 is about 29179.7303962871. The cubic root of 851456666 is about 947.8090473639.

The spelling of 851456666 in words is "eight hundred fifty-one million, four hundred fifty-six thousand, six hundred sixty-six".