866458055 has 4 divisors (see below), whose sum is σ = 1039749672. Its totient is φ = 693166440.

The previous prime is 866458049. The next prime is 866458067. The reversal of 866458055 is 550854668.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-866458055 is a prime.

It is a super-2 number, since 2×866458055² = 1501499122148766050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86645801 + ... + 86645810.

It is an arithmetic number, because the mean of its divisors is an integer number (259937418).

Almost surely, 2^866458055 is an apocalyptic number.

866458055 is a deficient number, since it is larger than the sum of its proper divisors (173291617).

866458055 is a wasteful number, since it uses less digits than its factorization.

866458055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173291616.

The product of its (nonzero) digits is 1152000, while the sum is 47.

The square root of 866458055 is about 29435.6595815348. The cubic root of 866458055 is about 953.3429979976.

The spelling of 866458055 in words is "eight hundred sixty-six million, four hundred fifty-eight thousand, fifty-five".