3770040721 has 2 divisors, whose sum is σ = 3770040722. Its totient is φ = 3770040720.

The previous prime is 3770040719. The next prime is 3770040749. The reversal of 3770040721 is 1270400773.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2128899600 + 1641141121 = 46140^2 + 40511^2 .

It is a cyclic number.

It is not a de Polignac number, because 3770040721 - 2¹ = 3770040719 is a prime.

Together with 3770040719, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (3770040221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1885020360 + 1885020361.

It is an arithmetic number, because the mean of its divisors is an integer number (1885020361).

Almost surely, 2^3770040721 is an apocalyptic number.

It is an amenable number.

3770040721 is a deficient number, since it is larger than the sum of its proper divisors (1).

3770040721 is an equidigital number, since it uses as much as digits as its factorization.

3770040721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8232, while the sum is 31.

The square root of 3770040721 is about 61400.6573336149. The cubic root of 3770040721 is about 1556.3789453412.

The spelling of 3770040721 in words is "three billion, seven hundred seventy million, forty thousand, seven hundred twenty-one".