66725736 has 64 divisors (see below), whose sum is σ = 207982080. Its totient is φ = 17330880.

The previous prime is 66725717. The next prime is 66725749. The reversal of 66725736 is 63752766.

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16206 + ... + 19901.

It is an arithmetic number, because the mean of its divisors is an integer number (3249720).

Almost surely, 2^66725736 is an apocalyptic number.

66725736 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

66725736 is an abundant number, since it is smaller than the sum of its proper divisors (141256344).

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

66725736 is a wasteful number, since it uses less digits than its factorization.

66725736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36134 (or 36130 counting only the distinct ones).

The product of its digits is 317520, while the sum is 42.

The square root of 66725736 is about 8168.5822515293. The cubic root of 66725736 is about 405.5998548914.

The spelling of 66725736 in words is "sixty-six million, seven hundred twenty-five thousand, seven hundred thirty-six".