726537666733 has 16 divisors (see below), whose sum is σ = 741272912640. Its totient is φ = 711898574400.

The previous prime is 726537666731. The next prime is 726537666769. The reversal of 726537666733 is 337666735627.

It is a cyclic number.

It is not a de Polignac number, because 726537666733 - 2¹ = 726537666731 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (61).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (726537666731) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17778598 + ... + 17819416.

It is an arithmetic number, because the mean of its divisors is an integer number (46329557040).

Almost surely, 2^726537666733 is an apocalyptic number.

It is an amenable number.

726537666733 is a deficient number, since it is larger than the sum of its proper divisors (14735245907).

726537666733 is a wasteful number, since it uses less digits than its factorization.

726537666733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41988.

The product of its digits is 120022560, while the sum is 61.

The spelling of 726537666733 in words is "seven hundred twenty-six billion, five hundred thirty-seven million, six hundred sixty-six thousand, seven hundred thirty-three".