65992145 has 4 divisors (see below), whose sum is σ = 79190580. Its totient is φ = 52793712.

The previous prime is 65992141. The next prime is 65992153. The reversal of 65992145 is 54129956.

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 25897921 + 40094224 = 5089^2 + 6332^2 .

It is a cyclic number.

It is not a de Polignac number, because 65992145 - 2² = 65992141 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65992141) 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, 6599210 + ... + 6599219.

It is an arithmetic number, because the mean of its divisors is an integer number (19797645).

Almost surely, 2^65992145 is an apocalyptic number.

It is an amenable number.

65992145 is a deficient number, since it is larger than the sum of its proper divisors (13198435).

65992145 is a wasteful number, since it uses less digits than its factorization.

65992145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13198434.

The product of its digits is 97200, while the sum is 41.

The square root of 65992145 is about 8123.5549484201. The cubic root of 65992145 is about 404.1079691330.

The spelling of 65992145 in words is "sixty-five million, nine hundred ninety-two thousand, one hundred forty-five".