166420101 has 8 divisors (see below), whose sum is σ = 222041344. Its totient is φ = 110872800.

The previous prime is 166420099. The next prime is 166420109. The reversal of 166420101 is 101024661.

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

It is not a de Polignac number, because 166420101 - 2¹ = 166420099 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 (166420109) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13000 + ... + 22401.

It is an arithmetic number, because the mean of its divisors is an integer number (27755168).

Almost surely, 2^166420101 is an apocalyptic number.

It is an amenable number.

166420101 is a deficient number, since it is larger than the sum of its proper divisors (55621243).

166420101 is a wasteful number, since it uses less digits than its factorization.

166420101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36971.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 166420101 is about 12900.3915056869. The cubic root of 166420101 is about 550.0496935816.

Adding to 166420101 its reverse (101024661), we get a palindrome (267444762).

The spelling of 166420101 in words is "one hundred sixty-six million, four hundred twenty thousand, one hundred one".