75726666 has 48 divisors (see below), whose sum is σ = 173815200. Its totient is φ = 23760864.

The previous prime is 75726659. The next prime is 75726667. The reversal of 75726666 is 66662757.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

Its product of digits (635040) is a multiple of the sum of its prime divisors (1440).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (75726667) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 60600 + ... + 61836.

It is an arithmetic number, because the mean of its divisors is an integer number (3621150).

Almost surely, 2^75726666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 75726666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86907600).

75726666 is an abundant number, since it is smaller than the sum of its proper divisors (98088534).

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

75726666 is a wasteful number, since it uses less digits than its factorization.

75726666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1443 (or 1440 counting only the distinct ones).

The product of its digits is 635040, while the sum is 45.

The square root of 75726666 is about 8702.1069862419. The cubic root of 75726666 is about 423.0739437824.

The spelling of 75726666 in words is "seventy-five million, seven hundred twenty-six thousand, six hundred sixty-six".