84146866 has 4 divisors (see below), whose sum is σ = 126220302. Its totient is φ = 42073432.

The previous prime is 84146863. The next prime is 84146891. The reversal of 84146866 is 66864148.

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., 78694641 + 5452225 = 8871^2 + 2335^2 .

It is not an unprimeable number, because it can be changed into a prime (84146863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21036715 + ... + 21036718.

Almost surely, 2^84146866 is an apocalyptic number.

84146866 is a deficient number, since it is larger than the sum of its proper divisors (42073436).

84146866 is a wasteful number, since it uses less digits than its factorization.

84146866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42073435.

The product of its digits is 221184, while the sum is 43.

The square root of 84146866 is about 9173.1600879958. The cubic root of 84146866 is about 438.2070044500.

The spelling of 84146866 in words is "eighty-four million, one hundred forty-six thousand, eight hundred sixty-six".