866497632 has 384 divisors, whose sum is σ = 3121348608. Its totient is φ = 203212800.

The previous prime is 866497631. The next prime is 866497637. The reversal of 866497632 is 236794668.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866497631) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6822753 + ... + 6822879.

It is an arithmetic number, because the mean of its divisors is an integer number (8128512).

Almost surely, 2^866497632 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 866497632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1560674304).

866497632 is an abundant number, since it is smaller than the sum of its proper divisors (2254850976).

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

866497632 is a wasteful number, since it uses less digits than its factorization.

866497632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242 (or 234 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 51.

The square root of 866497632 is about 29436.3318366946. The cubic root of 866497632 is about 953.3575129842.

The spelling of 866497632 in words is "eight hundred sixty-six million, four hundred ninety-seven thousand, six hundred thirty-two".