620666227969 has 2 divisors, whose sum is σ = 620666227970. Its totient is φ = 620666227968.

The previous prime is 620666227943. The next prime is 620666227981. The reversal of 620666227969 is 969722666026.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 331157664369 + 289508563600 = 575463^2 + 538060^2 .

It is a cyclic number.

It is not a de Polignac number, because 620666227969 - 2¹⁹ = 620665703681 is a prime.

It is a super-2 number, since 2×620666227969² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (620666227919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310333113984 + 310333113985.

It is an arithmetic number, because the mean of its divisors is an integer number (310333113985).

Almost surely, 2^620666227969 is an apocalyptic number.

It is an amenable number.

620666227969 is a deficient number, since it is larger than the sum of its proper divisors (1).

620666227969 is an equidigital number, since it uses as much as digits as its factorization.

620666227969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 35271936, while the sum is 61.

The spelling of 620666227969 in words is "six hundred twenty billion, six hundred sixty-six million, two hundred twenty-seven thousand, nine hundred sixty-nine".