2662551461221 has 2 divisors, whose sum is σ = 2662551461222. Its totient is φ = 2662551461220.

The previous prime is 2662551461209. The next prime is 2662551461233. The reversal of 2662551461221 is 1221641552662.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (2662551461209) and next prime (2662551461233).

It can be written as a sum of positive squares in only one way, i.e., 2645131420996 + 17420040225 = 1626386^2 + 131985^2 .

It is a cyclic number.

It is not a de Polignac number, because 2662551461221 - 2⁷ = 2662551461093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2662551461201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1331275730610 + 1331275730611.

It is an arithmetic number, because the mean of its divisors is an integer number (1331275730611).

Almost surely, 2^{2662551461221} is an apocalyptic number.

It is an amenable number.

2662551461221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2662551461221 is an equidigital number, since it uses as much as digits as its factorization.

2662551461221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 345600, while the sum is 43.

The spelling of 2662551461221 in words is "two trillion, six hundred sixty-two billion, five hundred fifty-one million, four hundred sixty-one thousand, two hundred twenty-one".