661652551424233 has 2 divisors, whose sum is σ = 661652551424234. Its totient is φ = 661652551424232.

The previous prime is 661652551424213. The next prime is 661652551424287. The reversal of 661652551424233 is 332424155256166.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 543313769864464 + 118338781559769 = 23309092^2 + 10878363^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-661652551424233 is a prime.

It is not a weakly prime, because it can be changed into another prime (661652551424213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330826275712116 + 330826275712117.

It is an arithmetic number, because the mean of its divisors is an integer number (330826275712117).

Almost surely, 2^{661652551424233} is an apocalyptic number.

It is an amenable number.

661652551424233 is a deficient number, since it is larger than the sum of its proper divisors (1).

661652551424233 is an equidigital number, since it uses as much as digits as its factorization.

661652551424233 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104000, while the sum is 55.

The spelling of 661652551424233 in words is "six hundred sixty-one trillion, six hundred fifty-two billion, five hundred fifty-one million, four hundred twenty-four thousand, two hundred thirty-three".