66020123 has 8 divisors (see below), whose sum is σ = 71166816. Its totient is φ = 60883200.

The previous prime is 66020081. The next prime is 66020147. The reversal of 66020123 is 32102066.

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

It is a cyclic number.

It is not a de Polignac number, because 66020123 - 2¹⁶ = 65954587 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66020095 and 66020104.

It is not an unprimeable number, because it can be changed into a prime (66020183) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 17963 + ... + 21323.

It is an arithmetic number, because the mean of its divisors is an integer number (8895852).

Almost surely, 2^66020123 is an apocalyptic number.

66020123 is a deficient number, since it is larger than the sum of its proper divisors (5146693).

66020123 is a wasteful number, since it uses less digits than its factorization.

66020123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4885.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 66020123 is about 8125.2767952852. The cubic root of 66020123 is about 404.1650695418.

Adding to 66020123 its reverse (32102066), we get a palindrome (98122189).

The spelling of 66020123 in words is "sixty-six million, twenty thousand, one hundred twenty-three".