166502221383 has 8 divisors (see below), whose sum is σ = 222015469696. Its totient is φ = 110995227000.

The previous prime is 166502221381. The next prime is 166502221387. The reversal of 166502221383 is 383122205661.

It is a happy number.

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

It is not a de Polignac number, because 166502221383 - 2¹ = 166502221381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166502221381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1501003 + ... + 1608108.

It is an arithmetic number, because the mean of its divisors is an integer number (27751933712).

Almost surely, 2^166502221383 is an apocalyptic number.

166502221383 is a deficient number, since it is larger than the sum of its proper divisors (55513248313).

166502221383 is a wasteful number, since it uses less digits than its factorization.

166502221383 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3126965.

The product of its (nonzero) digits is 103680, while the sum is 39.

The spelling of 166502221383 in words is "one hundred sixty-six billion, five hundred two million, two hundred twenty-one thousand, three hundred eighty-three".