66552924485881 has 2 divisors, whose sum is σ = 66552924485882. Its totient is φ = 66552924485880.

The previous prime is 66552924485851. The next prime is 66552924485897. The reversal of 66552924485881 is 18858442925566.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58493571275881 + 8059353210000 = 7648109^2 + 2838900^2 .

It is a cyclic number.

It is not a de Polignac number, because 66552924485881 - 2⁴³ = 57756831463673 is a prime.

It is a super-2 number, since 2×66552924485881² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (66552924485851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33276462242940 + 33276462242941.

It is an arithmetic number, because the mean of its divisors is an integer number (33276462242941).

Almost surely, 2^{66552924485881} is an apocalyptic number.

It is an amenable number.

66552924485881 is a deficient number, since it is larger than the sum of its proper divisors (1).

66552924485881 is an equidigital number, since it uses as much as digits as its factorization.

66552924485881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1327104000, while the sum is 73.

The spelling of 66552924485881 in words is "sixty-six trillion, five hundred fifty-two billion, nine hundred twenty-four million, four hundred eighty-five thousand, eight hundred eighty-one".