866516093 has 4 divisors (see below), whose sum is σ = 868574748. Its totient is φ = 864457440.

The previous prime is 866516051. The next prime is 866516107. The reversal of 866516093 is 390615668.

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

It can be written as a sum of positive squares in 2 ways, for example, as 373764889 + 492751204 = 19333^2 + 22198^2 .

It is a cyclic number.

It is not a de Polignac number, because 866516093 - 2⁶ = 866516029 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866516023) 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, 1028696 + ... + 1029537.

It is an arithmetic number, because the mean of its divisors is an integer number (217143687).

Almost surely, 2^866516093 is an apocalyptic number.

It is an amenable number.

866516093 is a deficient number, since it is larger than the sum of its proper divisors (2058655).

866516093 is a wasteful number, since it uses less digits than its factorization.

866516093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2058654.

The product of its (nonzero) digits is 233280, while the sum is 44.

The square root of 866516093 is about 29436.6454101007. The cubic root of 866516093 is about 953.3642834617.

The spelling of 866516093 in words is "eight hundred sixty-six million, five hundred sixteen thousand, ninety-three".