866674 has 4 divisors (see below), whose sum is σ = 1300014. Its totient is φ = 433336.

The previous prime is 866653. The next prime is 866683. The reversal of 866674 is 476668.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 710649 + 156025 = 843^2 + 395^2 .

It is a super-2 number, since 2×866674² = 1502247644552, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 216667 + ... + 216670.

2⁸⁶⁶⁶⁷⁴ is an apocalyptic number.

866674 is a deficient number, since it is larger than the sum of its proper divisors (433340).

866674 is a wasteful number, since it uses less digits than its factorization.

866674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433339.

The product of its digits is 48384, while the sum is 37.

The square root of 866674 is about 930.9532748747. The cubic root of 866674 is about 95.3422191119.

It can be divided in two parts, 866 and 674, that added together give a triangular number (1540 = T₅₅).

The spelling of 866674 in words is "eight hundred sixty-six thousand, six hundred seventy-four".