661362098053 has 2 divisors, whose sum is σ = 661362098054. Its totient is φ = 661362098052.

The previous prime is 661362098041. The next prime is 661362098057. The reversal of 661362098053 is 350890263166.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 658204444804 + 3157653249 = 811298^2 + 56193^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-661362098053 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 661362097988 and 661362098006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (661362098057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330681049026 + 330681049027.

It is an arithmetic number, because the mean of its divisors is an integer number (330681049027).

Almost surely, 2^661362098053 is an apocalyptic number.

It is an amenable number.

661362098053 is a deficient number, since it is larger than the sum of its proper divisors (1).

661362098053 is an equidigital number, since it uses as much as digits as its factorization.

661362098053 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1399680, while the sum is 49.

The spelling of 661362098053 in words is "six hundred sixty-one billion, three hundred sixty-two million, ninety-eight thousand, fifty-three".