866020668 has 48 divisors (see below), whose sum is σ = 2086074144. Its totient is φ = 279417600.

The previous prime is 866020667. The next prime is 866020669.

866020668 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (866020667) and next prime (866020669).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866020667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82518 + ... + 92418.

It is an arithmetic number, because the mean of its divisors is an integer number (43459878).

Almost surely, 2^866020668 is an apocalyptic number.

It is an amenable number.

866020668 is an abundant number, since it is smaller than the sum of its proper divisors (1220053476).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

866020668 is a wasteful number, since it uses less digits than its factorization.

866020668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10142 (or 10140 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 42.

The square root of 866020668 is about 29428.2291006442. The cubic root of 866020668 is about 953.1825555254.

The spelling of 866020668 in words is "eight hundred sixty-six million, twenty thousand, six hundred sixty-eight".