65556506051 has 2 divisors, whose sum is σ = 65556506052. Its totient is φ = 65556506050.

The previous prime is 65556506009. The next prime is 65556506063. The reversal of 65556506051 is 15060565556.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65556506051 - 2¹⁴ = 65556489667 is a prime.

It is a super-2 number, since 2×65556506051² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 65556505993 and 65556506011.

It is not a weakly prime, because it can be changed into another prime (65556506251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32778253025 + 32778253026.

It is an arithmetic number, because the mean of its divisors is an integer number (32778253026).

Almost surely, 2^65556506051 is an apocalyptic number.

65556506051 is a deficient number, since it is larger than the sum of its proper divisors (1).

65556506051 is an equidigital number, since it uses as much as digits as its factorization.

65556506051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 675000, while the sum is 44.

The spelling of 65556506051 in words is "sixty-five billion, five hundred fifty-six million, five hundred six thousand, fifty-one".