866786465715744 has 48 divisors (see below), whose sum is σ = 2600359397149248. Its totient is φ = 247653275918592.

The previous prime is 866786465715739. The next prime is 866786465715749. The reversal of 866786465715744 is 447517564687668.

It is an interprime number because it is at equal distance from previous prime (866786465715739) and next prime (866786465715749).

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (84).

It is not an unprimeable number, because it can be changed into a prime (866786465715749) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 644930405367 + ... + 644930406710.

It is an arithmetic number, because the mean of its divisors is an integer number (54174154107276).

Almost surely, 2^{866786465715744} is an apocalyptic number.

866786465715744 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

866786465715744 is an abundant number, since it is smaller than the sum of its proper divisors (1733572931433504).

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

866786465715744 is a wasteful number, since it uses less digits than its factorization.

866786465715744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1289860812097 (or 1289860812089 counting only the distinct ones).

The product of its digits is 45519667200, while the sum is 84.

The spelling of 866786465715744 in words is "eight hundred sixty-six trillion, seven hundred eighty-six billion, four hundred sixty-five million, seven hundred fifteen thousand, seven hundred forty-four".