866513772126343 has 16 divisors (see below), whose sum is σ = 953737015209984. Its totient is φ = 780711839328960.

The previous prime is 866513772126337. The next prime is 866513772126349. The reversal of 866513772126343 is 343621277315668.

It is an interprime number because it is at equal distance from previous prime (866513772126337) and next prime (866513772126349).

It is not a de Polignac number, because 866513772126343 - 2¹³ = 866513772118151 is a prime.

It is a super-2 number, since 2×866513772126343² (a number of 31 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866513772126349) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 326167830 + ... + 328813747.

It is an arithmetic number, because the mean of its divisors is an integer number (59608563450624).

Almost surely, 2^{866513772126343} is an apocalyptic number.

866513772126343 is a deficient number, since it is larger than the sum of its proper divisors (87223243083641).

866513772126343 is a wasteful number, since it uses less digits than its factorization.

866513772126343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 654982662.

The product of its digits is 182891520, while the sum is 64.

The spelling of 866513772126343 in words is "eight hundred sixty-six trillion, five hundred thirteen billion, seven hundred seventy-two million, one hundred twenty-six thousand, three hundred forty-three".