66572123 has 2 divisors, whose sum is σ = 66572124. Its totient is φ = 66572122.

The previous prime is 66572111. The next prime is 66572137. The reversal of 66572123 is 32127566.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66572123 - 2¹⁴ = 66555739 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66572123.

It is not a weakly prime, because it can be changed into another prime (66572183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33286061 + 33286062.

It is an arithmetic number, because the mean of its divisors is an integer number (33286062).

Almost surely, 2^66572123 is an apocalyptic number.

66572123 is a deficient number, since it is larger than the sum of its proper divisors (1).

66572123 is an equidigital number, since it uses as much as digits as its factorization.

66572123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15120, while the sum is 32.

The square root of 66572123 is about 8159.1741616416. The cubic root of 66572123 is about 405.2883644644.

Adding to 66572123 its reverse (32127566), we get a palindrome (98699689).

The spelling of 66572123 in words is "sixty-six million, five hundred seventy-two thousand, one hundred twenty-three".