723690660 has 288 divisors, whose sum is σ = 2626477056. Its totient is φ = 144633600.

The previous prime is 723690647. The next prime is 723690689. The reversal of 723690660 is 66096327.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4439739 + ... + 4439901.

It is an arithmetic number, because the mean of its divisors is an integer number (9119712).

Almost surely, 2^723690660 is an apocalyptic number.

723690660 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 723690660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1313238528).

723690660 is an abundant number, since it is smaller than the sum of its proper divisors (1902786396).

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

723690660 is a wasteful number, since it uses less digits than its factorization.

723690660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255 (or 222 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 39.

The square root of 723690660 is about 26901.4992147278. The cubic root of 723690660 is about 897.8097605783.

The spelling of 723690660 in words is "seven hundred twenty-three million, six hundred ninety thousand, six hundred sixty".