866724458635140 has 1152 divisors, whose sum is σ = 3051585686274048. Its totient is φ = 182597014978560.

The previous prime is 866724458635117. The next prime is 866724458635159. The reversal of 866724458635140 is 41536854427668.

It is a happy number.

It is a super-2 number, since 2×866724458635140² (a number of 31 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 469260669697 + ... + 469260671543.

It is an arithmetic number, because the mean of its divisors is an integer number (2648945908224).

Almost surely, 2^{866724458635140} 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 866724458635140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1525792843137024).

866724458635140 is an abundant number, since it is smaller than the sum of its proper divisors (2184861227638908).

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

866724458635140 is a wasteful number, since it uses less digits than its factorization.

866724458635140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2777 (or 2768 counting only the distinct ones).

The product of its (nonzero) digits is 928972800, while the sum is 69.

The spelling of 866724458635140 in words is "eight hundred sixty-six trillion, seven hundred twenty-four billion, four hundred fifty-eight million, six hundred thirty-five thousand, one hundred forty".