866867650 has 48 divisors (see below), whose sum is σ = 1770333120. Its totient is φ = 313185600.

The previous prime is 866867591. The next prime is 866867657. The reversal of 866867650 is 56768668.

It is not an unprimeable number, because it can be changed into a prime (866867657) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 81331 + ... + 91369.

It is an arithmetic number, because the mean of its divisors is an integer number (36881940).

Almost surely, 2^866867650 is an apocalyptic number.

866867650 is an abundant number, since it is smaller than the sum of its proper divisors (903465470).

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

866867650 is a wasteful number, since it uses less digits than its factorization.

866867650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10219 (or 10214 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 52.

The square root of 866867650 is about 29442.6162220683. The cubic root of 866867650 is about 953.4931968478.

The spelling of 866867650 in words is "eight hundred sixty-six million, eight hundred sixty-seven thousand, six hundred fifty".