66162143 has 4 divisors (see below), whose sum is σ = 66353160. Its totient is φ = 65971128.

The previous prime is 66162119. The next prime is 66162149. The reversal of 66162143 is 34126166.

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 66162143 - 2¹² = 66158047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66162149) 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, 94988 + ... + 95681.

It is an arithmetic number, because the mean of its divisors is an integer number (16588290).

Almost surely, 2^66162143 is an apocalyptic number.

66162143 is a deficient number, since it is larger than the sum of its proper divisors (191017).

66162143 is a wasteful number, since it uses less digits than its factorization.

66162143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191016.

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

The square root of 66162143 is about 8134.0114949513. The cubic root of 66162143 is about 404.4546702025.

The spelling of 66162143 in words is "sixty-six million, one hundred sixty-two thousand, one hundred forty-three".