720075678 has 128 divisors (see below), whose sum is σ = 1757184000. Its totient is φ = 196481376.

The previous prime is 720075667. The next prime is 720075701. The reversal of 720075678 is 876570027.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

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, 6990975 + ... + 6991077.

It is an arithmetic number, because the mean of its divisors is an integer number (13728000).

Almost surely, 2^720075678 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 720075678, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (878592000).

720075678 is an abundant number, since it is smaller than the sum of its proper divisors (1037108322).

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

720075678 is a wasteful number, since it uses less digits than its factorization.

720075678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251 (or 237 counting only the distinct ones).

The product of its (nonzero) digits is 164640, while the sum is 42.

The square root of 720075678 is about 26834.2258692141. The cubic root of 720075678 is about 896.3123504102.

The spelling of 720075678 in words is "seven hundred twenty million, seventy-five thousand, six hundred seventy-eight".