65518461 has 6 divisors (see below), whose sum is σ = 94637790. Its totient is φ = 43678968.

The previous prime is 65518433. The next prime is 65518463. The reversal of 65518461 is 16481556.

It can be written as a sum of positive squares in only one way, i.e., 65512836 + 5625 = 8094^2 + 75^2 .

It is not a de Polignac number, because 65518461 - 2⁷ = 65518333 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65518463) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3639906 + ... + 3639923.

It is an arithmetic number, because the mean of its divisors is an integer number (15772965).

Almost surely, 2^65518461 is an apocalyptic number.

It is an amenable number.

65518461 is a deficient number, since it is larger than the sum of its proper divisors (29119329).

65518461 is a wasteful number, since it uses less digits than its factorization.

65518461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7279835 (or 7279832 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The square root of 65518461 is about 8094.3474721561. The cubic root of 65518461 is about 403.1387663588.

The spelling of 65518461 in words is "sixty-five million, five hundred eighteen thousand, four hundred sixty-one".