4661040421 has 2 divisors, whose sum is σ = 4661040422. Its totient is φ = 4661040420.

The previous prime is 4661040409. The next prime is 4661040443. The reversal of 4661040421 is 1240401664.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3200730625 + 1460309796 = 56575^2 + 38214^2 .

It is a cyclic number.

It is not a de Polignac number, because 4661040421 - 2⁹ = 4661039909 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4661040421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4661040481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2330520210 + 2330520211.

It is an arithmetic number, because the mean of its divisors is an integer number (2330520211).

Almost surely, 2^4661040421 is an apocalyptic number.

It is an amenable number.

4661040421 is a deficient number, since it is larger than the sum of its proper divisors (1).

4661040421 is an equidigital number, since it uses as much as digits as its factorization.

4661040421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 4661040421 is about 68271.8127853655. The cubic root of 4661040421 is about 1670.4274690673.

The spelling of 4661040421 in words is "four billion, six hundred sixty-one million, forty thousand, four hundred twenty-one".