65260821401 has 2 divisors, whose sum is σ = 65260821402. Its totient is φ = 65260821400.

The previous prime is 65260821377. The next prime is 65260821407. The reversal of 65260821401 is 10412806256.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38770003801 + 26490817600 = 196901^2 + 162760^2 .

It is a cyclic number.

It is not a de Polignac number, because 65260821401 - 2⁶ = 65260821337 is a prime.

It is not a weakly prime, because it can be changed into another prime (65260821407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32630410700 + 32630410701.

It is an arithmetic number, because the mean of its divisors is an integer number (32630410701).

Almost surely, 2^65260821401 is an apocalyptic number.

It is an amenable number.

65260821401 is a deficient number, since it is larger than the sum of its proper divisors (1).

65260821401 is an equidigital number, since it uses as much as digits as its factorization.

65260821401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23040, while the sum is 35.

The spelling of 65260821401 in words is "sixty-five billion, two hundred sixty million, eight hundred twenty-one thousand, four hundred one".