166450605331 has 8 divisors (see below), whose sum is σ = 169066089360. Its totient is φ = 163838978688.

The previous prime is 166450605329. The next prime is 166450605337. The reversal of 166450605331 is 133506054661.

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 166450605331 - 2¹ = 166450605329 is a prime.

It is a super-2 number, since 2×166450605331² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166450605337) 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, 877306 + ... + 1050031.

It is an arithmetic number, because the mean of its divisors is an integer number (21133261170).

Almost surely, 2^166450605331 is an apocalyptic number.

166450605331 is a deficient number, since it is larger than the sum of its proper divisors (2615484029).

166450605331 is a wasteful number, since it uses less digits than its factorization.

166450605331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1928693.

The product of its (nonzero) digits is 194400, while the sum is 40.

Adding to 166450605331 its reverse (133506054661), we get a palindrome (299956659992).

The spelling of 166450605331 in words is "one hundred sixty-six billion, four hundred fifty million, six hundred five thousand, three hundred thirty-one".