65540371 has 4 divisors (see below), whose sum is σ = 70581952. Its totient is φ = 60498792.

The previous prime is 65540353. The next prime is 65540393. The reversal of 65540371 is 17304556.

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 65540371 - 2⁷ = 65540243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65540341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2520771 + ... + 2520796.

It is an arithmetic number, because the mean of its divisors is an integer number (17645488).

Almost surely, 2^65540371 is an apocalyptic number.

65540371 is a deficient number, since it is larger than the sum of its proper divisors (5041581).

65540371 is a wasteful number, since it uses less digits than its factorization.

65540371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5041580.

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 65540371 is about 8095.7007726323. The cubic root of 65540371 is about 403.1836991703.

The spelling of 65540371 in words is "sixty-five million, five hundred forty thousand, three hundred seventy-one".