664274677019 has 2 divisors, whose sum is σ = 664274677020. Its totient is φ = 664274677018.

The previous prime is 664274676883. The next prime is 664274677037. The reversal of 664274677019 is 910776472466.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 664274677019 - 2²⁰ = 664273628443 is a prime.

It is a super-2 number, since 2×664274677019² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (664274677219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332137338509 + 332137338510.

It is an arithmetic number, because the mean of its divisors is an integer number (332137338510).

Almost surely, 2^664274677019 is an apocalyptic number.

664274677019 is a deficient number, since it is larger than the sum of its proper divisors (1).

664274677019 is an equidigital number, since it uses as much as digits as its factorization.

664274677019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21337344, while the sum is 59.

The spelling of 664274677019 in words is "six hundred sixty-four billion, two hundred seventy-four million, six hundred seventy-seven thousand, nineteen".