74121066709 has 4 divisors (see below), whose sum is σ = 74121980416. Its totient is φ = 74120153004.

The previous prime is 74121066683. The next prime is 74121066757. The reversal of 74121066709 is 90766012147.

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, and also an emirpimes, since its reverse is a distinct semiprime: 90766012147 = 4327 ⋅20976661.

It is a cyclic number.

It is not a de Polignac number, because 74121066709 - 2⁷ = 74121066581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74121066809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 321879 + ... + 501844.

It is an arithmetic number, because the mean of its divisors is an integer number (18530495104).

Almost surely, 2^74121066709 is an apocalyptic number.

It is an amenable number.

74121066709 is a deficient number, since it is larger than the sum of its proper divisors (913707).

74121066709 is an equidigital number, since it uses as much as digits as its factorization.

74121066709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 913706.

The product of its (nonzero) digits is 127008, while the sum is 43.

The spelling of 74121066709 in words is "seventy-four billion, one hundred twenty-one million, sixty-six thousand, seven hundred nine".