66123534 has 16 divisors (see below), whose sum is σ = 139207680. Its totient is φ = 20881080.

The previous prime is 66123517. The next prime is 66123569. The reversal of 66123534 is 43532166.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 289902 + ... + 290129.

It is an arithmetic number, because the mean of its divisors is an integer number (8700480).

Almost surely, 2^66123534 is an apocalyptic number.

66123534 is an abundant number, since it is smaller than the sum of its proper divisors (73084146).

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

66123534 is a wasteful number, since it uses less digits than its factorization.

66123534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580055.

The product of its digits is 12960, while the sum is 30.

The square root of 66123534 is about 8131.6378424030. The cubic root of 66123534 is about 404.3759815540.

The spelling of 66123534 in words is "sixty-six million, one hundred twenty-three thousand, five hundred thirty-four".