66160223406 has 96 divisors (see below), whose sum is σ = 151305485760. Its totient is φ = 20861148672.

The previous prime is 66160223387. The next prime is 66160223461. The reversal of 66160223406 is 60432206166.

66160223406 is a `hidden beast` number, since 6 + 6 + 1 + 602 + 2 + 3 + 40 + 6 = 666.

It is a super-2 number, since 2×66160223406² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 26751786 + ... + 26754258.

It is an arithmetic number, because the mean of its divisors is an integer number (1576098810).

Almost surely, 2^66160223406 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66160223406, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75652742880).

66160223406 is an abundant number, since it is smaller than the sum of its proper divisors (85145262354).

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

66160223406 is a wasteful number, since it uses less digits than its factorization.

66160223406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3530 (or 3527 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

The spelling of 66160223406 in words is "sixty-six billion, one hundred sixty million, two hundred twenty-three thousand, four hundred six".