73668005291 has 4 divisors (see below), whose sum is σ = 74397391584. Its totient is φ = 72938619000.

The previous prime is 73668005287. The next prime is 73668005293. The reversal of 73668005291 is 19250086637.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19250086637 = 113 ⋅170354749.

It is a cyclic number.

It is not a de Polignac number, because 73668005291 - 2² = 73668005287 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73668005293) 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, 364692995 + ... + 364693196.

It is an arithmetic number, because the mean of its divisors is an integer number (18599347896).

Almost surely, 2^73668005291 is an apocalyptic number.

73668005291 is a deficient number, since it is larger than the sum of its proper divisors (729386293).

73668005291 is a wasteful number, since it uses less digits than its factorization.

73668005291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 729386292.

The product of its (nonzero) digits is 544320, while the sum is 47.

The spelling of 73668005291 in words is "seventy-three billion, six hundred sixty-eight million, five thousand, two hundred ninety-one".