166420082 has 4 divisors (see below), whose sum is σ = 249630126. Its totient is φ = 83210040.

The previous prime is 166420073. The next prime is 166420097. The reversal of 166420082 is 280024661.

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., 164378041 + 2042041 = 12821^2 + 1429^2 .

It is a super-3 number, since 3×166420082³ (a number of 26 digits) contains 333 as substring.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 41605019 + ... + 41605022.

Almost surely, 2^166420082 is an apocalyptic number.

166420082 is a deficient number, since it is larger than the sum of its proper divisors (83210044).

166420082 is an equidigital number, since it uses as much as digits as its factorization.

166420082 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83210043.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 166420082 is about 12900.3907692752. The cubic root of 166420082 is about 550.0496726487.

The spelling of 166420082 in words is "one hundred sixty-six million, four hundred twenty thousand, eighty-two".