851970666 has 8 divisors (see below), whose sum is σ = 1703941344. Its totient is φ = 283990220.

The previous prime is 851970643. The next prime is 851970667. The reversal of 851970666 is 666079158.

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

851970666 is an admirable number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (851970667) 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, 70997550 + ... + 70997561.

It is an arithmetic number, because the mean of its divisors is an integer number (212992668).

Almost surely, 2^851970666 is an apocalyptic number.

851970666 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

851970666 is a wasteful number, since it uses less digits than its factorization.

851970666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141995116.

The product of its (nonzero) digits is 544320, while the sum is 48.

The square root of 851970666 is about 29188.5365511874. The cubic root of 851970666 is about 947.9997307233. Note that the first 3 decimals are identical.

The spelling of 851970666 in words is "eight hundred fifty-one million, nine hundred seventy thousand, six hundred sixty-six".