65518437 has 4 divisors (see below), whose sum is σ = 87357920. Its totient is φ = 43678956.

The previous prime is 65518433. The next prime is 65518463. The reversal of 65518437 is 73481556.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 65518437 - 2² = 65518433 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 65518395 and 65518404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65518433) 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, 10919737 + ... + 10919742.

It is an arithmetic number, because the mean of its divisors is an integer number (21839480).

Almost surely, 2^65518437 is an apocalyptic number.

It is an amenable number.

65518437 is a deficient number, since it is larger than the sum of its proper divisors (21839483).

65518437 is a wasteful number, since it uses less digits than its factorization.

65518437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21839482.

The product of its digits is 100800, while the sum is 39.

The square root of 65518437 is about 8094.3459896399. The cubic root of 65518437 is about 403.1387171343.

The spelling of 65518437 in words is "sixty-five million, five hundred eighteen thousand, four hundred thirty-seven".