866977020 has 240 divisors, whose sum is σ = 3347940288. Its totient is φ = 182891520.

The previous prime is 866977003. The next prime is 866977043. The reversal of 866977020 is 20779668.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 144480 + ... + 150360.

Almost surely, 2^866977020 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 866977020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1673970144).

866977020 is an abundant number, since it is smaller than the sum of its proper divisors (2480963268).

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

866977020 is a wasteful number, since it uses less digits than its factorization.

866977020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5922 (or 5911 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The square root of 866977020 is about 29444.4735052267. The cubic root of 866977020 is about 953.5332949203.

The spelling of 866977020 in words is "eight hundred sixty-six million, nine hundred seventy-seven thousand, twenty".