66160145 has 4 divisors (see below), whose sum is σ = 79392180. Its totient is φ = 52928112.

The previous prime is 66160139. The next prime is 66160153. The reversal of 66160145 is 54106166.

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

It can be written as a sum of positive squares in 2 ways, for example, as 37847104 + 28313041 = 6152^2 + 5321^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66160145 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6616010 + ... + 6616019.

It is an arithmetic number, because the mean of its divisors is an integer number (19848045).

Almost surely, 2^66160145 is an apocalyptic number.

It is an amenable number.

66160145 is a deficient number, since it is larger than the sum of its proper divisors (13232035).

66160145 is a wasteful number, since it uses less digits than its factorization.

66160145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13232034.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 66160145 is about 8133.8886763958. Note that the first 3 decimals coincide. The cubic root of 66160145 is about 404.4505988483.

It can be divided in two parts, 661 and 60145, that added together give a palindrome (60806).

The spelling of 66160145 in words is "sixty-six million, one hundred sixty thousand, one hundred forty-five".