866453397600 has 1152 divisors, whose sum is σ = 3575771136000. Its totient is φ = 181469030400.

The previous prime is 866453397587. The next prime is 866453397629. The reversal of 866453397600 is 6793354668.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 484863907 + ... + 484865693.

It is an arithmetic number, because the mean of its divisors is an integer number (3103968000).

Almost surely, 2^866453397600 is an apocalyptic number.

866453397600 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 866453397600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1787885568000).

866453397600 is an abundant number, since it is smaller than the sum of its proper divisors (2709317738400).

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

866453397600 is a wasteful number, since it uses less digits than its factorization.

866453397600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1881 (or 1854 counting only the distinct ones).

The product of its (nonzero) digits is 19595520, while the sum is 57.

The spelling of 866453397600 in words is "eight hundred sixty-six billion, four hundred fifty-three million, three hundred ninety-seven thousand, six hundred".