66421102 has 16 divisors (see below), whose sum is σ = 113415552. Its totient is φ = 28878520.

The previous prime is 66421099. The next prime is 66421109. The reversal of 66421102 is 20112466.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66421109) 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, 65128 + ... + 66139.

It is an arithmetic number, because the mean of its divisors is an integer number (7088472).

Almost surely, 2^66421102 is an apocalyptic number.

66421102 is a deficient number, since it is larger than the sum of its proper divisors (46994450).

66421102 is a wasteful number, since it uses less digits than its factorization.

66421102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131303.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 66421102 is about 8149.9142326775. The cubic root of 66421102 is about 404.9816625341.

Adding to 66421102 its reverse (20112466), we get a palindrome (86533568).

It can be divided in two parts, 6642 and 1102, that added together give a square (7744 = 88²).

The spelling of 66421102 in words is "sixty-six million, four hundred twenty-one thousand, one hundred two".