7463660021 has 2 divisors, whose sum is σ = 7463660022. Its totient is φ = 7463660020.

The previous prime is 7463659993. The next prime is 7463660069. The reversal of 7463660021 is 1200663647.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4954752100 + 2508907921 = 70390^2 + 50089^2 .

It is an emirp because it is prime and its reverse (1200663647) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7463660021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7463660221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3731830010 + 3731830011.

It is an arithmetic number, because the mean of its divisors is an integer number (3731830011).

Almost surely, 2^7463660021 is an apocalyptic number.

It is an amenable number.

7463660021 is a deficient number, since it is larger than the sum of its proper divisors (1).

7463660021 is an equidigital number, since it uses as much as digits as its factorization.

7463660021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 35.

The square root of 7463660021 is about 86392.4766458284. The cubic root of 7463660021 is about 1954.2672293845.

The spelling of 7463660021 in words is "seven billion, four hundred sixty-three million, six hundred sixty thousand, twenty-one".