65051605 has 8 divisors (see below), whose sum is σ = 82653912. Its totient is φ = 48979968.

The previous prime is 65051603. The next prime is 65051627. The reversal of 65051605 is 50615056.

It can be written as a sum of positive squares in 4 ways, for example, as 6666724 + 58384881 = 2582^2 + 7641^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 65051605 - 2¹ = 65051603 is a prime.

It is a super-2 number, since 2×65051605² = 8463422626152050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65051603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 382572 + ... + 382741.

It is an arithmetic number, because the mean of its divisors is an integer number (10331739).

Almost surely, 2^65051605 is an apocalyptic number.

It is an amenable number.

65051605 is a deficient number, since it is larger than the sum of its proper divisors (17602307).

65051605 is a wasteful number, since it uses less digits than its factorization.

65051605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 765335.

The product of its (nonzero) digits is 4500, while the sum is 28.

The square root of 65051605 is about 8065.4575195707. The cubic root of 65051605 is about 402.1789526111.

It can be divided in two parts, 65051 and 605, that added together give a palindrome (65656).

The spelling of 65051605 in words is "sixty-five million, fifty-one thousand, six hundred five".