7740373721 has 2 divisors, whose sum is σ = 7740373722. Its totient is φ = 7740373720.

The previous prime is 7740373709. The next prime is 7740373757. The reversal of 7740373721 is 1273730477.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4906302025 + 2834071696 = 70045^2 + 53236^2 .

It is a cyclic number.

It is not a de Polignac number, because 7740373721 - 2¹⁴ = 7740357337 is a prime.

It is not a weakly prime, because it can be changed into another prime (7740273721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3870186860 + 3870186861.

It is an arithmetic number, because the mean of its divisors is an integer number (3870186861).

Almost surely, 2^7740373721 is an apocalyptic number.

It is an amenable number.

7740373721 is a deficient number, since it is larger than the sum of its proper divisors (1).

7740373721 is an equidigital number, since it uses as much as digits as its factorization.

7740373721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 172872, while the sum is 41.

The square root of 7740373721 is about 87979.3937294410. The cubic root of 7740373721 is about 1978.1261154991.

The spelling of 7740373721 in words is "seven billion, seven hundred forty million, three hundred seventy-three thousand, seven hundred twenty-one".