38070066721 has 4 divisors (see below), whose sum is σ = 38210546944. Its totient is φ = 37929586500.

The previous prime is 38070066659. The next prime is 38070066731. The reversal of 38070066721 is 12766007083.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 38070066721 - 2¹⁷ = 38069935649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38070066731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70239705 + ... + 70240246.

It is an arithmetic number, because the mean of its divisors is an integer number (9552636736).

Almost surely, 2^38070066721 is an apocalyptic number.

It is an amenable number.

38070066721 is a deficient number, since it is larger than the sum of its proper divisors (140480223).

38070066721 is a wasteful number, since it uses less digits than its factorization.

38070066721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140480222.

The product of its (nonzero) digits is 84672, while the sum is 40.

The spelling of 38070066721 in words is "thirty-eight billion, seventy million, sixty-six thousand, seven hundred twenty-one".