65067661 has 2 divisors, whose sum is σ = 65067662. Its totient is φ = 65067660.

The previous prime is 65067631. The next prime is 65067671. The reversal of 65067661 is 16676056.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62568100 + 2499561 = 7910^2 + 1581^2 .

It is a cyclic number.

It is not a de Polignac number, because 65067661 - 2¹³ = 65059469 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 65067661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65067631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32533830 + 32533831.

It is an arithmetic number, because the mean of its divisors is an integer number (32533831).

Almost surely, 2^65067661 is an apocalyptic number.

It is an amenable number.

65067661 is a deficient number, since it is larger than the sum of its proper divisors (1).

65067661 is an equidigital number, since it uses as much as digits as its factorization.

65067661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 65067661 is about 8066.4528139697. The cubic root of 65067661 is about 402.2120384156.

The spelling of 65067661 in words is "sixty-five million, sixty-seven thousand, six hundred sixty-one".