7466420021 has 2 divisors, whose sum is σ = 7466420022. Its totient is φ = 7466420020.

The previous prime is 7466419991. The next prime is 7466420081. The reversal of 7466420021 is 1200246647.

7466420021 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7336779025 + 129640996 = 85655^2 + 11386^2 .

It is a cyclic number.

It is not a de Polignac number, because 7466420021 - 2¹⁸ = 7466157877 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7466420021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7466420081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3733210010 + 3733210011.

It is an arithmetic number, because the mean of its divisors is an integer number (3733210011).

Almost surely, 2^7466420021 is an apocalyptic number.

It is an amenable number.

7466420021 is a deficient number, since it is larger than the sum of its proper divisors (1).

7466420021 is an equidigital number, since it uses as much as digits as its factorization.

7466420021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 7466420021 is about 86408.4487825120. The cubic root of 7466420021 is about 1954.5080903391.

Adding to 7466420021 its reverse (1200246647), we get a palindrome (8666666668).

The spelling of 7466420021 in words is "seven billion, four hundred sixty-six million, four hundred twenty thousand, twenty-one".