73666026432240 has 320 divisors, whose sum is σ = 252339786362880. Its totient is φ = 17628649758720.

The previous prime is 73666026432227. The next prime is 73666026432259. The reversal of 73666026432240 is 4223462066637.

It is a super-2 number, since 2×73666026432240² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 142362462 + ... + 142878978.

It is an arithmetic number, because the mean of its divisors is an integer number (788561832384).

Almost surely, 2^{73666026432240} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 73666026432240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126169893181440).

73666026432240 is an abundant number, since it is smaller than the sum of its proper divisors (178673759930640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

73666026432240 is a wasteful number, since it uses less digits than its factorization.

73666026432240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517240 (or 517234 counting only the distinct ones).

The product of its (nonzero) digits is 10450944, while the sum is 51.

Adding to 73666026432240 its reverse (4223462066637), we get a palindrome (77889488498877).

The spelling of 73666026432240 in words is "seventy-three trillion, six hundred sixty-six billion, twenty-six million, four hundred thirty-two thousand, two hundred forty".