166640355060 has 384 divisors, whose sum is σ = 507451392000. Its totient is φ = 40772616192.

The previous prime is 166640355041. The next prime is 166640355061. The reversal of 166640355060 is 60553046661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166640355061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 727687026 + ... + 727687254.

It is an arithmetic number, because the mean of its divisors is an integer number (1321488000).

Almost surely, 2^166640355060 is an apocalyptic number.

166640355060 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 166640355060, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (253725696000).

166640355060 is an abundant number, since it is smaller than the sum of its proper divisors (340811036940).

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

166640355060 is a wasteful number, since it uses less digits than its factorization.

166640355060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523 (or 521 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 42.

The spelling of 166640355060 in words is "one hundred sixty-six billion, six hundred forty million, three hundred fifty-five thousand, sixty".