3001721663 has 4 divisors (see below), whose sum is σ = 3002216448. Its totient is φ = 3001226880.

The previous prime is 3001721641. The next prime is 3001721689. The reversal of 3001721663 is 3661271003.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3661271003 = 13 ⋅281636231.

It is a cyclic number.

It is not a de Polignac number, because 3001721663 - 2²⁴ = 2984944447 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 (3001721623) 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, 238178 + ... + 250463.

It is an arithmetic number, because the mean of its divisors is an integer number (750554112).

Almost surely, 2^3001721663 is an apocalyptic number.

3001721663 is a deficient number, since it is larger than the sum of its proper divisors (494785).

3001721663 is an equidigital number, since it uses as much as digits as its factorization.

3001721663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494784.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 3001721663 is about 54787.9700573036. The cubic root of 3001721663 is about 1442.5254139599.

Adding to 3001721663 its reverse (3661271003), we get a palindrome (6662992666).

The spelling of 3001721663 in words is "three billion, one million, seven hundred twenty-one thousand, six hundred sixty-three".