166151610122 has 4 divisors (see below), whose sum is σ = 249227415186. Its totient is φ = 83075805060.

The previous prime is 166151610083. The next prime is 166151610169. The reversal of 166151610122 is 221016151661.

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

It can be written as a sum of positive squares in only one way, i.e., 108090370441 + 58061239681 = 328771^2 + 240959^2 .

It is a super-2 number, since 2×166151610122² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41537902529 + ... + 41537902532.

Almost surely, 2^166151610122 is an apocalyptic number.

166151610122 is a deficient number, since it is larger than the sum of its proper divisors (83075805064).

166151610122 is an equidigital number, since it uses as much as digits as its factorization.

166151610122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83075805063.

The product of its (nonzero) digits is 4320, while the sum is 32.

Adding to 166151610122 its reverse (221016151661), we get a palindrome (387167761783).

The spelling of 166151610122 in words is "one hundred sixty-six billion, one hundred fifty-one million, six hundred ten thousand, one hundred twenty-two".