866597952 has 112 divisors (see below), whose sum is σ = 2587752000. Its totient is φ = 253532160.

The previous prime is 866597939. The next prime is 866597969. The reversal of 866597952 is 259795668.

It is a junction number, because it is equal to n+sod(n) for n = 866597892 and 866597901.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54174 + ... + 68322.

Almost surely, 2^866597952 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 866597952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1293876000).

866597952 is an abundant number, since it is smaller than the sum of its proper divisors (1721154048).

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

866597952 is a wasteful number, since it uses less digits than its factorization.

866597952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14204 (or 14194 counting only the distinct ones).

The product of its digits is 8164800, while the sum is 57.

The square root of 866597952 is about 29438.0358040410. The cubic root of 866597952 is about 953.3943036733.

The spelling of 866597952 in words is "eight hundred sixty-six million, five hundred ninety-seven thousand, nine hundred fifty-two".