65601261 has 12 divisors (see below), whose sum is σ = 103371840. Its totient is φ = 39758280.

The previous prime is 65601253. The next prime is 65601269. The reversal of 65601261 is 16210656.

It is a happy number.

65601261 is a `hidden beast` number, since 656 + 0 + 1 + 2 + 6 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (65601253) and next prime (65601269).

It is not a de Polignac number, because 65601261 - 2³ = 65601253 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65601269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 331221 + ... + 331418.

It is an arithmetic number, because the mean of its divisors is an integer number (8614320).

Almost surely, 2^65601261 is an apocalyptic number.

It is an amenable number.

65601261 is a deficient number, since it is larger than the sum of its proper divisors (37770579).

65601261 is a wasteful number, since it uses less digits than its factorization.

65601261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662656 (or 662653 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 65601261 is about 8099.4605375914. The cubic root of 65601261 is about 403.3085192180.

The spelling of 65601261 in words is "sixty-five million, six hundred one thousand, two hundred sixty-one".