166703440128 has 144 divisors (see below), whose sum is σ = 445916390976. Its totient is φ = 55287930880.

The previous prime is 166703440109. The next prime is 166703440147. The reversal of 166703440128 is 821044307661.

It is an interprime number because it is at equal distance from previous prime (166703440109) and next prime (166703440147).

It is a self number, because there is not a number n which added to its sum of digits gives 166703440128.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 246238126 + ... + 246238802.

It is an arithmetic number, because the mean of its divisors is an integer number (3096641604).

Almost surely, 2^166703440128 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166703440128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (222958195488).

166703440128 is an abundant number, since it is smaller than the sum of its proper divisors (279212950848).

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

166703440128 is an equidigital number, since it uses as much as digits as its factorization.

166703440128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1840 (or 1826 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 42.

Adding to 166703440128 its reverse (821044307661), we get a palindrome (987747747789).

The spelling of 166703440128 in words is "one hundred sixty-six billion, seven hundred three million, four hundred forty thousand, one hundred twenty-eight".