164421886 has 16 divisors (see below), whose sum is σ = 255649536. Its totient is φ = 79257816.

The previous prime is 164421883. The next prime is 164421889. The reversal of 164421886 is 688124461.

It is an interprime number because it is at equal distance from previous prime (164421883) and next prime (164421889).

It is a super-3 number, since 3×164421886³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164421883) 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, 6756 + ... + 19351.

It is an arithmetic number, because the mean of its divisors is an integer number (15978096).

Almost surely, 2^164421886 is an apocalyptic number.

164421886 is a deficient number, since it is larger than the sum of its proper divisors (91227650).

164421886 is a wasteful number, since it uses less digits than its factorization.

164421886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26223.

The product of its digits is 73728, while the sum is 40.

The square root of 164421886 is about 12822.7097760185. The cubic root of 164421886 is about 547.8393312168.

The spelling of 164421886 in words is "one hundred sixty-four million, four hundred twenty-one thousand, eight hundred eighty-six".