65872845 has 20 divisors (see below), whose sum is σ = 118083900. Its totient is φ = 35131968.

The previous prime is 65872843. The next prime is 65872879. The reversal of 65872845 is 54827856.

65872845 is a `hidden beast` number, since 6 + 587 + 28 + 45 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 26409321 + 39463524 = 5139^2 + 6282^2 .

It is not a de Polignac number, because 65872845 - 2¹ = 65872843 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 65872845.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65872843) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 80920 + ... + 81729.

It is an arithmetic number, because the mean of its divisors is an integer number (5904195).

Almost surely, 2^65872845 is an apocalyptic number.

It is an amenable number.

65872845 is a deficient number, since it is larger than the sum of its proper divisors (52211055).

65872845 is a wasteful number, since it uses less digits than its factorization.

65872845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162666 (or 162657 counting only the distinct ones).

The product of its digits is 537600, while the sum is 45.

The square root of 65872845 is about 8116.2087824304. The cubic root of 65872845 is about 403.8643080065.

The spelling of 65872845 in words is "sixty-five million, eight hundred seventy-two thousand, eight hundred forty-five".