26660493019961 has 2 divisors, whose sum is σ = 26660493019962. Its totient is φ = 26660493019960.

The previous prime is 26660493019841. The next prime is 26660493020033. The reversal of 26660493019961 is 16991039406662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25857031770361 + 803461249600 = 5084981^2 + 896360^2 .

It is a cyclic number.

It is not a de Polignac number, because 26660493019961 - 2⁴² = 22262446508857 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 26660493019894 and 26660493019903.

It is not a weakly prime, because it can be changed into another prime (26660493019561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13330246509980 + 13330246509981.

It is an arithmetic number, because the mean of its divisors is an integer number (13330246509981).

Almost surely, 2^{26660493019961} is an apocalyptic number.

It is an amenable number.

26660493019961 is a deficient number, since it is larger than the sum of its proper divisors (1).

26660493019961 is an equidigital number, since it uses as much as digits as its factorization.

26660493019961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22674816, while the sum is 62.

The spelling of 26660493019961 in words is "twenty-six trillion, six hundred sixty billion, four hundred ninety-three million, nineteen thousand, nine hundred sixty-one".