866077884 has 36 divisors (see below), whose sum is σ = 2502003504. Its totient is φ = 247450752.

The previous prime is 866077853. The next prime is 866077889. The reversal of 866077884 is 488770668.

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 866077884.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866077889) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1718157 + ... + 1718660.

Almost surely, 2^866077884 is an apocalyptic number.

866077884 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

866077884 is an abundant number, since it is smaller than the sum of its proper divisors (1635925620).

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

866077884 is a wasteful number, since it uses less digits than its factorization.

866077884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3436834 (or 3436829 counting only the distinct ones).

The product of its (nonzero) digits is 3612672, while the sum is 54.

The square root of 866077884 is about 29429.2012124013. The cubic root of 866077884 is about 953.2035465918.

The spelling of 866077884 in words is "eight hundred sixty-six million, seventy-seven thousand, eight hundred eighty-four".