66123933 has 16 divisors (see below), whose sum is σ = 94118400. Its totient is φ = 41171760.

The previous prime is 66123917. The next prime is 66123943. The reversal of 66123933 is 33932166.

It is not a de Polignac number, because 66123933 - 2⁴ = 66123917 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66123894 and 66123903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66123943) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4123 + ... + 12216.

It is an arithmetic number, because the mean of its divisors is an integer number (5882400).

Almost surely, 2^66123933 is an apocalyptic number.

It is an amenable number.

66123933 is a deficient number, since it is larger than the sum of its proper divisors (27994467).

66123933 is a wasteful number, since it uses less digits than its factorization.

66123933 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16432.

The product of its digits is 17496, while the sum is 33.

The square root of 66123933 is about 8131.6623761688. The cubic root of 66123933 is about 404.3767949088.

The spelling of 66123933 in words is "sixty-six million, one hundred twenty-three thousand, nine hundred thirty-three".