556620142066601 has 2 divisors, whose sum is σ = 556620142066602. Its totient is φ = 556620142066600.

The previous prime is 556620142066553. The next prime is 556620142066607. The reversal of 556620142066601 is 106660241026655.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 407523245712025 + 149096896354576 = 20187205^2 + 12210524^2 .

It is a cyclic number.

It is not a de Polignac number, because 556620142066601 - 2⁴² = 552222095555497 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 556620142066601.

It is not a weakly prime, because it can be changed into another prime (556620142066607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278310071033300 + 278310071033301.

It is an arithmetic number, because the mean of its divisors is an integer number (278310071033301).

Almost surely, 2^{556620142066601} is an apocalyptic number.

It is an amenable number.

556620142066601 is a deficient number, since it is larger than the sum of its proper divisors (1).

556620142066601 is an equidigital number, since it uses as much as digits as its factorization.

556620142066601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3110400, while the sum is 50.

The spelling of 556620142066601 in words is "five hundred fifty-six trillion, six hundred twenty billion, one hundred forty-two million, sixty-six thousand, six hundred one".