2401664621 has 2 divisors, whose sum is σ = 2401664622. Its totient is φ = 2401664620.

The previous prime is 2401664591. The next prime is 2401664651. The reversal of 2401664621 is 1264661042.

It is a balanced prime because it is at equal distance from previous prime (2401664591) and next prime (2401664651).

It can be written as a sum of positive squares in only one way, i.e., 1473792100 + 927872521 = 38390^2 + 30461^2 .

It is a cyclic number.

It is not a de Polignac number, because 2401664621 - 2¹⁰ = 2401663597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2401664651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1200832310 + 1200832311.

It is an arithmetic number, because the mean of its divisors is an integer number (1200832311).

Almost surely, 2^2401664621 is an apocalyptic number.

It is an amenable number.

2401664621 is a deficient number, since it is larger than the sum of its proper divisors (1).

2401664621 is an equidigital number, since it uses as much as digits as its factorization.

2401664621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 2401664621 is about 49006.7813776828. The cubic root of 2401664621 is about 1339.1753708895.

The spelling of 2401664621 in words is "two billion, four hundred one million, six hundred sixty-four thousand, six hundred twenty-one".