65672215 has 16 divisors (see below), whose sum is σ = 90462528. Its totient is φ = 44833536.

The previous prime is 65672177. The next prime is 65672219. The reversal of 65672215 is 51227656.

65672215 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 65672215 - 2¹⁷ = 65541143 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 (65672219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4129 + ... + 12181.

It is an arithmetic number, because the mean of its divisors is an integer number (5653908).

Almost surely, 2^65672215 is an apocalyptic number.

65672215 is a deficient number, since it is larger than the sum of its proper divisors (24790313).

65672215 is a wasteful number, since it uses less digits than its factorization.

65672215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8298.

The product of its digits is 25200, while the sum is 34.

The square root of 65672215 is about 8103.8395221031. The cubic root of 65672215 is about 403.4538723273.

The spelling of 65672215 in words is "sixty-five million, six hundred seventy-two thousand, two hundred fifteen".