866432161658 has 8 divisors (see below), whose sum is σ = 1485312277152. Its totient is φ = 371328069276.

The previous prime is 866432161649. The next prime is 866432161663. The reversal of 866432161658 is 856161234668.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30944005760 + ... + 30944005787.

It is an arithmetic number, because the mean of its divisors is an integer number (185664034644).

Almost surely, 2^866432161658 is an apocalyptic number.

866432161658 is a deficient number, since it is larger than the sum of its proper divisors (618880115494).

866432161658 is a wasteful number, since it uses less digits than its factorization.

866432161658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61888011556.

The product of its digits is 9953280, while the sum is 56.

The spelling of 866432161658 in words is "eight hundred sixty-six billion, four hundred thirty-two million, one hundred sixty-one thousand, six hundred fifty-eight".