66736736 has 24 divisors (see below), whose sum is σ = 143333064. Its totient is φ = 30334720.

The previous prime is 66736723. The next prime is 66736741. The reversal of 66736736 is 63763766.

66736736 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94445 + ... + 95148.

It is an arithmetic number, because the mean of its divisors is an integer number (5972211).

Almost surely, 2^66736736 is an apocalyptic number.

It is an amenable number.

66736736 is an abundant number, since it is smaller than the sum of its proper divisors (76596328).

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

66736736 is a wasteful number, since it uses less digits than its factorization.

66736736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189614 (or 189606 counting only the distinct ones).

The product of its digits is 571536, while the sum is 44.

The square root of 66736736 is about 8169.2555352370. The cubic root of 66736736 is about 405.6221419105.

The spelling of 66736736 in words is "sixty-six million, seven hundred thirty-six thousand, seven hundred thirty-six".