65602261 has 4 divisors (see below), whose sum is σ = 65618752. Its totient is φ = 65585772.

The previous prime is 65602213. The next prime is 65602283. The reversal of 65602261 is 16220656.

65602261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 65602261 - 2⁹ = 65601749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65602661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1810 + ... + 11596.

It is an arithmetic number, because the mean of its divisors is an integer number (16404688).

Almost surely, 2^65602261 is an apocalyptic number.

It is an amenable number.

65602261 is a deficient number, since it is larger than the sum of its proper divisors (16491).

65602261 is an equidigital number, since it uses as much as digits as its factorization.

65602261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16490.

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

The square root of 65602261 is about 8099.5222698626. The cubic root of 65602261 is about 403.3105685001.

The spelling of 65602261 in words is "sixty-five million, six hundred two thousand, two hundred sixty-one".