166222020 has 24 divisors (see below), whose sum is σ = 465421824. Its totient is φ = 44325856.

The previous prime is 166222009. The next prime is 166222027. The reversal of 166222020 is 20222661.

It is a super-3 number, since 3×166222020³ (a number of 26 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (166222027) 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, 1385124 + ... + 1385243.

It is an arithmetic number, because the mean of its divisors is an integer number (19392576).

Almost surely, 2^166222020 is an apocalyptic number.

166222020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166222020 is an abundant number, since it is smaller than the sum of its proper divisors (299199804).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

166222020 is a wasteful number, since it uses less digits than its factorization.

166222020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2770379 (or 2770377 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 166222020 is about 12892.7118947101. The cubic root of 166222020 is about 549.8313753038.

Adding to 166222020 its reverse (20222661), we get a palindrome (186444681).

The spelling of 166222020 in words is "one hundred sixty-six million, two hundred twenty-two thousand, twenty".