991741066073 has 8 divisors (see below), whose sum is σ = 1050088665600. Its totient is φ = 933394565440.

The previous prime is 991741066031. The next prime is 991741066091. The reversal of 991741066073 is 370660147199.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 991741066073 - 2¹⁸ = 991740803929 is a prime.

It is a super-2 number, since 2×991741066073² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (991741066013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2242328 + ... + 2647926.

It is an arithmetic number, because the mean of its divisors is an integer number (131261083200).

Almost surely, 2^991741066073 is an apocalyptic number.

It is an amenable number.

991741066073 is a deficient number, since it is larger than the sum of its proper divisors (58347599527).

991741066073 is a wasteful number, since it uses less digits than its factorization.

991741066073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549447.

The product of its (nonzero) digits is 1714608, while the sum is 53.

The spelling of 991741066073 in words is "nine hundred ninety-one billion, seven hundred forty-one million, sixty-six thousand, seventy-three".