65623601 has 2 divisors, whose sum is σ = 65623602. Its totient is φ = 65623600.

The previous prime is 65623561. The next prime is 65623693. The reversal of 65623601 is 10632656.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34810000 + 30813601 = 5900^2 + 5551^2 .

It is a cyclic number.

It is not a de Polignac number, because 65623601 - 2¹⁰ = 65622577 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (65623801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32811800 + 32811801.

It is an arithmetic number, because the mean of its divisors is an integer number (32811801).

Almost surely, 2^65623601 is an apocalyptic number.

It is an amenable number.

65623601 is a deficient number, since it is larger than the sum of its proper divisors (1).

65623601 is an equidigital number, since it uses as much as digits as its factorization.

65623601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 65623601 is about 8100.8395243950. The cubic root of 65623601 is about 403.3542952170.

The spelling of 65623601 in words is "sixty-five million, six hundred twenty-three thousand, six hundred one".