166263243720 has 128 divisors (see below), whose sum is σ = 579707366400. Its totient is φ = 37358896896.

The previous prime is 166263243683. The next prime is 166263243721. The reversal of 166263243720 is 27342362661.

166263243720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×166263243720² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (166263243721) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 1627834 + ... + 1726953.

It is an arithmetic number, because the mean of its divisors is an integer number (4528963800).

Almost surely, 2^166263243720 is an apocalyptic number.

166263243720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166263243720 is an abundant number, since it is smaller than the sum of its proper divisors (413444122680).

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

166263243720 is a wasteful number, since it uses less digits than its factorization.

166263243720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3354867 (or 3354863 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 42.

The spelling of 166263243720 in words is "one hundred sixty-six billion, two hundred sixty-three million, two hundred forty-three thousand, seven hundred twenty".