726396660 has 120 divisors (see below), whose sum is σ = 2485951776. Its totient is φ = 176091840.

The previous prime is 726396653. The next prime is 726396667. The reversal of 726396660 is 66693627.

It is an interprime number because it is at equal distance from previous prime (726396653) and next prime (726396667).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (726396667) 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 39 ways as a sum of consecutive naturals, for example, 2562 + ... + 38201.

Almost surely, 2^726396660 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 726396660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1242975888).

726396660 is an abundant number, since it is smaller than the sum of its proper divisors (1759555116).

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

726396660 is a wasteful number, since it uses less digits than its factorization.

726396660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40795 (or 40784 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 45.

The square root of 726396660 is about 26951.7468821596. The cubic root of 726396660 is about 898.9273888471.

It can be divided in two parts, 726 and 396660, that added together give a triangular number (397386 = T₈₉₁).

The spelling of 726396660 in words is "seven hundred twenty-six million, three hundred ninety-six thousand, six hundred sixty".