73406666731 has 8 divisors (see below), whose sum is σ = 75013562880. Its totient is φ = 71801647848.

The previous prime is 73406666681. The next prime is 73406666741. The reversal of 73406666731 is 13766660437.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73406666731 is a prime.

It is a super-2 number, since 2×73406666731² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73406666741) 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, 390111 + ... + 546808.

It is an arithmetic number, because the mean of its divisors is an integer number (9376695360).

Almost surely, 2^73406666731 is an apocalyptic number.

73406666731 is a deficient number, since it is larger than the sum of its proper divisors (1606896149).

73406666731 is a wasteful number, since it uses less digits than its factorization.

73406666731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 938633.

The product of its (nonzero) digits is 2286144, while the sum is 49.

The spelling of 73406666731 in words is "seventy-three billion, four hundred six million, six hundred sixty-six thousand, seven hundred thirty-one".