851660474 has 12 divisors (see below), whose sum is σ = 1486060794. Its totient is φ = 364997304.

The previous prime is 851660471. The next prime is 851660477. The reversal of 851660474 is 474066158.

It is an interprime number because it is at equal distance from previous prime (851660471) and next prime (851660477).

It can be written as a sum of positive squares in only one way, i.e., 804119449 + 47541025 = 28357^2 + 6895^2 .

It is a super-3 number, since 3×851660474³ (a number of 28 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (851660471) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4345109 + ... + 4345304.

Almost surely, 2^851660474 is an apocalyptic number.

851660474 is a deficient number, since it is larger than the sum of its proper divisors (634400320).

851660474 is a wasteful number, since it uses less digits than its factorization.

851660474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8690429 (or 8690422 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 41.

The square root of 851660474 is about 29183.2224745658. Note that the first 3 decimals coincide. The cubic root of 851660474 is about 947.8846650919.

The spelling of 851660474 in words is "eight hundred fifty-one million, six hundred sixty thousand, four hundred seventy-four".