657120011 has 2 divisors, whose sum is σ = 657120012. Its totient is φ = 657120010.

The previous prime is 657119941. The next prime is 657120017. The reversal of 657120011 is 110021756.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 657120011 - 2¹⁴ = 657103627 is a prime.

It is not a weakly prime, because it can be changed into another prime (657120017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328560005 + 328560006.

It is an arithmetic number, because the mean of its divisors is an integer number (328560006).

Almost surely, 2^657120011 is an apocalyptic number.

657120011 is a deficient number, since it is larger than the sum of its proper divisors (1).

657120011 is an equidigital number, since it uses as much as digits as its factorization.

657120011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 420, while the sum is 23.

The square root of 657120011 is about 25634.3521665752. The cubic root of 657120011 is about 869.3905146799.

Adding to 657120011 its reverse (110021756), we get a palindrome (767141767).

The spelling of 657120011 in words is "six hundred fifty-seven million, one hundred twenty thousand, eleven".