166063511238 has 32 divisors (see below), whose sum is σ = 349845411840. Its totient is φ = 52405405920.

The previous prime is 166063511233. The next prime is 166063511239. The reversal of 166063511238 is 832115360661.

It is a self number, because there is not a number n which added to its sum of digits gives 166063511238.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166063511233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 327445 + ... + 662832.

It is an arithmetic number, because the mean of its divisors is an integer number (10932669120).

Almost surely, 2^166063511238 is an apocalyptic number.

166063511238 is an abundant number, since it is smaller than the sum of its proper divisors (183781900602).

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

166063511238 is a wasteful number, since it uses less digits than its factorization.

166063511238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991772.

The product of its (nonzero) digits is 155520, while the sum is 42.

Adding to 166063511238 its reverse (832115360661), we get a palindrome (998178871899).

The spelling of 166063511238 in words is "one hundred sixty-six billion, sixty-three million, five hundred eleven thousand, two hundred thirty-eight".