66146123 has 4 divisors (see below), whose sum is σ = 66165408. Its totient is φ = 66126840.

The previous prime is 66146117. The next prime is 66146131. The reversal of 66146123 is 32164166.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66146123 - 2⁴ = 66146107 is a prime.

It is a super-2 number, since 2×66146123² = 8750619175862258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66146623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2948 + ... + 11873.

It is an arithmetic number, because the mean of its divisors is an integer number (16541352).

Almost surely, 2^66146123 is an apocalyptic number.

66146123 is a deficient number, since it is larger than the sum of its proper divisors (19285).

66146123 is a wasteful number, since it uses less digits than its factorization.

66146123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19284.

The product of its digits is 5184, while the sum is 29.

The square root of 66146123 is about 8133.0266813776. The cubic root of 66146123 is about 404.4220237043.

The spelling of 66146123 in words is "sixty-six million, one hundred forty-six thousand, one hundred twenty-three".