65672427661 has 2 divisors, whose sum is σ = 65672427662. Its totient is φ = 65672427660.

The previous prime is 65672427647. The next prime is 65672427673. The reversal of 65672427661 is 16672427656.

65672427661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36402350436 + 29270077225 = 190794^2 + 171085^2 .

It is a cyclic number.

It is not a de Polignac number, because 65672427661 - 2¹³ = 65672419469 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 65672427599 and 65672427608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65672427631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32836213830 + 32836213831.

It is an arithmetic number, because the mean of its divisors is an integer number (32836213831).

Almost surely, 2^65672427661 is an apocalyptic number.

It is an amenable number.

65672427661 is a deficient number, since it is larger than the sum of its proper divisors (1).

65672427661 is an equidigital number, since it uses as much as digits as its factorization.

65672427661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5080320, while the sum is 52.

The spelling of 65672427661 in words is "sixty-five billion, six hundred seventy-two million, four hundred twenty-seven thousand, six hundred sixty-one".