166734182438 has 4 divisors (see below), whose sum is σ = 250101273660. Its totient is φ = 83367091218.

The previous prime is 166734182437. The next prime is 166734182449. The reversal of 166734182438 is 834281437661.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 166734182438.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166734182431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41683545608 + ... + 41683545611.

It is an arithmetic number, because the mean of its divisors is an integer number (62525318415).

Almost surely, 2^166734182438 is an apocalyptic number.

166734182438 is a deficient number, since it is larger than the sum of its proper divisors (83367091222).

166734182438 is an equidigital number, since it uses as much as digits as its factorization.

166734182438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83367091221.

The product of its digits is 4644864, while the sum is 53.

The spelling of 166734182438 in words is "one hundred sixty-six billion, seven hundred thirty-four million, one hundred eighty-two thousand, four hundred thirty-eight".