661452250127 has 2 divisors, whose sum is σ = 661452250128. Its totient is φ = 661452250126.

The previous prime is 661452250111. The next prime is 661452250141. The reversal of 661452250127 is 721052254166.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 661452250127 - 2⁴ = 661452250111 is a prime.

It is a super-2 number, since 2×661452250127² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (661452250187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330726125063 + 330726125064.

It is an arithmetic number, because the mean of its divisors is an integer number (330726125064).

Almost surely, 2^661452250127 is an apocalyptic number.

661452250127 is a deficient number, since it is larger than the sum of its proper divisors (1).

661452250127 is an equidigital number, since it uses as much as digits as its factorization.

661452250127 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 201600, while the sum is 41.

The spelling of 661452250127 in words is "six hundred sixty-one billion, four hundred fifty-two million, two hundred fifty thousand, one hundred twenty-seven".