166223272626740 has 120 divisors (see below), whose sum is σ = 407426329326240. Its totient is φ = 56962350629184.

The previous prime is 166223272626673. The next prime is 166223272626767. The reversal of 166223272626740 is 47626272322661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 95319971 + ... + 97048149.

It is an arithmetic number, because the mean of its divisors is an integer number (3395219411052).

Almost surely, 2^{166223272626740} is an apocalyptic number.

166223272626740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166223272626740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (203713164663120).

166223272626740 is an abundant number, since it is smaller than the sum of its proper divisors (241203056699500).

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

166223272626740 is a wasteful number, since it uses less digits than its factorization.

166223272626740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1730219 (or 1730196 counting only the distinct ones).

The product of its (nonzero) digits is 24385536, while the sum is 56.

The spelling of 166223272626740 in words is "one hundred sixty-six trillion, two hundred twenty-three billion, two hundred seventy-two million, six hundred twenty-six thousand, seven hundred forty".