7373766821 has 2 divisors, whose sum is σ = 7373766822. Its totient is φ = 7373766820.

The previous prime is 7373766737. The next prime is 7373766839. The reversal of 7373766821 is 1286673737.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5003440225 + 2370326596 = 70735^2 + 48686^2 .

It is a cyclic number.

It is not a de Polignac number, because 7373766821 - 2¹⁴ = 7373750437 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7373766821.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7373766871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3686883410 + 3686883411.

It is an arithmetic number, because the mean of its divisors is an integer number (3686883411).

Almost surely, 2^7373766821 is an apocalyptic number.

It is an amenable number.

7373766821 is a deficient number, since it is larger than the sum of its proper divisors (1).

7373766821 is an equidigital number, since it uses as much as digits as its factorization.

7373766821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1778112, while the sum is 50.

The square root of 7373766821 is about 85870.6400407031. The cubic root of 7373766821 is about 1946.3897101054.

The spelling of 7373766821 in words is "seven billion, three hundred seventy-three million, seven hundred sixty-six thousand, eight hundred twenty-one".