65606401 has 4 divisors (see below), whose sum is σ = 74978752. Its totient is φ = 56234052.

The previous prime is 65606393. The next prime is 65606459. The reversal of 65606401 is 10460656.

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 65606401 - 2³ = 65606393 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 65606401.

It is not an unprimeable number, because it can be changed into a prime (65606701) 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, 4686165 + ... + 4686178.

It is an arithmetic number, because the mean of its divisors is an integer number (18744688).

Almost surely, 2^65606401 is an apocalyptic number.

It is an amenable number.

65606401 is a deficient number, since it is larger than the sum of its proper divisors (9372351).

65606401 is an equidigital number, since it uses as much as digits as its factorization.

65606401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9372350.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 65606401 is about 8099.7778364595. Note that the first 3 decimals coincide. The cubic root of 65606401 is about 403.3190523065.

The spelling of 65606401 in words is "sixty-five million, six hundred six thousand, four hundred one".