866666571432 has 32 divisors (see below), whose sum is σ = 2202185554080. Its totient is φ = 284152973760.

The previous prime is 866666571403. The next prime is 866666571461. The reversal of 866666571432 is 234175666668.

It is an interprime number because it is at equal distance from previous prime (866666571403) and next prime (866666571461).

It is a super-2 number, since 2×866666571432² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 295991218 + ... + 295994145.

It is an arithmetic number, because the mean of its divisors is an integer number (68818298565).

Almost surely, 2^866666571432 is an apocalyptic number.

It is an amenable number.

866666571432 is an abundant number, since it is smaller than the sum of its proper divisors (1335518982648).

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

866666571432 is a wasteful number, since it uses less digits than its factorization.

866666571432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 591985433 (or 591985429 counting only the distinct ones).

The product of its digits is 52254720, while the sum is 60.

The spelling of 866666571432 in words is "eight hundred sixty-six billion, six hundred sixty-six million, five hundred seventy-one thousand, four hundred thirty-two".