657212663 has 2 divisors, whose sum is σ = 657212664. Its totient is φ = 657212662.

The previous prime is 657212659. The next prime is 657212683. The reversal of 657212663 is 366212756.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 657212663 - 2² = 657212659 is a prime.

It is equal to p_34148819 and since 657212663 and 34148819 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (657212683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328606331 + 328606332.

It is an arithmetic number, because the mean of its divisors is an integer number (328606332).

Almost surely, 2^657212663 is an apocalyptic number.

657212663 is a deficient number, since it is larger than the sum of its proper divisors (1).

657212663 is an equidigital number, since it uses as much as digits as its factorization.

657212663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 38.

The square root of 657212663 is about 25636.1592872255. The cubic root of 657212663 is about 869.4313732664.

The spelling of 657212663 in words is "six hundred fifty-seven million, two hundred twelve thousand, six hundred sixty-three".