166222067537 has 4 divisors (see below), whose sum is σ = 166225486260. Its totient is φ = 166218648816.

The previous prime is 166222067521. The next prime is 166222067617. The reversal of 166222067537 is 735760222661.

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

It can be written as a sum of positive squares in 2 ways, for example, as 85749994561 + 80472072976 = 292831^2 + 283676^2 .

It is a cyclic number.

It is not a de Polignac number, because 166222067537 - 2⁴ = 166222067521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 166222067491 and 166222067500.

It is not an unprimeable number, because it can be changed into a prime (166222007537) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1635362 + ... + 1734027.

It is an arithmetic number, because the mean of its divisors is an integer number (41556371565).

Almost surely, 2^166222067537 is an apocalyptic number.

It is an amenable number.

166222067537 is a deficient number, since it is larger than the sum of its proper divisors (3418723).

166222067537 is an equidigital number, since it uses as much as digits as its factorization.

166222067537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3418722.

The product of its (nonzero) digits is 1270080, while the sum is 47.

The spelling of 166222067537 in words is "one hundred sixty-six billion, two hundred twenty-two million, sixty-seven thousand, five hundred thirty-seven".