65616601 has 2 divisors, whose sum is σ = 65616602. Its totient is φ = 65616600.

The previous prime is 65616571. The next prime is 65616611. The reversal of 65616601 is 10661656.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60047001 + 5569600 = 7749^2 + 2360^2 .

It is a cyclic number.

It is not a de Polignac number, because 65616601 - 2¹¹ = 65614553 is a prime.

It is not a weakly prime, because it can be changed into another prime (65616611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32808300 + 32808301.

It is an arithmetic number, because the mean of its divisors is an integer number (32808301).

Almost surely, 2^65616601 is an apocalyptic number.

It is an amenable number.

65616601 is a deficient number, since it is larger than the sum of its proper divisors (1).

65616601 is an equidigital number, since it uses as much as digits as its factorization.

65616601 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 31.

The square root of 65616601 is about 8100.4074588875. The cubic root of 65616601 is about 403.3399529152.

The spelling of 65616601 in words is "sixty-five million, six hundred sixteen thousand, six hundred one".