65507613 has 16 divisors (see below), whose sum is σ = 94452480. Its totient is φ = 40226816.

The previous prime is 65507609. The next prime is 65507633. The reversal of 65507613 is 31670556.

It is a cyclic number.

It is not a de Polignac number, because 65507613 - 2² = 65507609 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65507633) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11268 + ... + 16061.

It is an arithmetic number, because the mean of its divisors is an integer number (5903280).

Almost surely, 2^65507613 is an apocalyptic number.

It is an amenable number.

65507613 is a deficient number, since it is larger than the sum of its proper divisors (28944867).

65507613 is a wasteful number, since it uses less digits than its factorization.

65507613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27396.

The product of its (nonzero) digits is 18900, while the sum is 33.

The square root of 65507613 is about 8093.6773471643. The cubic root of 65507613 is about 403.1165156799.

The spelling of 65507613 in words is "sixty-five million, five hundred seven thousand, six hundred thirteen".