166121762 has 8 divisors (see below), whose sum is σ = 249616236. Its totient is φ = 82916352.

The previous prime is 166121759. The next prime is 166121783. The reversal of 166121762 is 267121661.

It can be written as a sum of positive squares in 2 ways, for example, as 165920161 + 201601 = 12881^2 + 449^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70823 + ... + 73130.

Almost surely, 2^166121762 is an apocalyptic number.

166121762 is a deficient number, since it is larger than the sum of its proper divisors (83494474).

166121762 is a wasteful number, since it uses less digits than its factorization.

166121762 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144532.

The product of its digits is 6048, while the sum is 32.

The square root of 166121762 is about 12888.8231425526. The cubic root of 166121762 is about 549.7208081625.

The spelling of 166121762 in words is "one hundred sixty-six million, one hundred twenty-one thousand, seven hundred sixty-two".