51660646054049 has 2 divisors, whose sum is σ = 51660646054050. Its totient is φ = 51660646054048.

The previous prime is 51660646053983. The next prime is 51660646054063. The reversal of 51660646054049 is 94045064606615.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48449005723024 + 3211640331025 = 6960532^2 + 1792105^2 .

It is a cyclic number.

It is not a de Polignac number, because 51660646054049 - 2²⁸ = 51660377618593 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51660646053985 and 51660646054003.

It is not a weakly prime, because it can be changed into another prime (51660646014049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25830323027024 + 25830323027025.

It is an arithmetic number, because the mean of its divisors is an integer number (25830323027025).

Almost surely, 2^{51660646054049} is an apocalyptic number.

It is an amenable number.

51660646054049 is a deficient number, since it is larger than the sum of its proper divisors (1).

51660646054049 is an equidigital number, since it uses as much as digits as its factorization.

51660646054049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18662400, while the sum is 56.

The spelling of 51660646054049 in words is "fifty-one trillion, six hundred sixty billion, six hundred forty-six million, fifty-four thousand, forty-nine".