166451450243 has 8 divisors (see below), whose sum is σ = 189799843968. Its totient is φ = 144609404544.

The previous prime is 166451450227. The next prime is 166451450279. The reversal of 166451450243 is 342054154661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 166451450243 - 2⁴ = 166451450227 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 166451450243.

It is not an unprimeable number, because it can be changed into a prime (166451450213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 376586771 + ... + 376587212.

It is an arithmetic number, because the mean of its divisors is an integer number (23724980496).

Almost surely, 2^166451450243 is an apocalyptic number.

166451450243 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

166451450243 is a deficient number, since it is larger than the sum of its proper divisors (23348393725).

166451450243 is a wasteful number, since it uses less digits than its factorization.

166451450243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 753174013.

The product of its (nonzero) digits is 345600, while the sum is 41.

The spelling of 166451450243 in words is "one hundred sixty-six billion, four hundred fifty-one million, four hundred fifty thousand, two hundred forty-three".