66725260 has 36 divisors (see below), whose sum is σ = 163002672. Its totient is φ = 22876896.

The previous prime is 66725189. The next prime is 66725261. The reversal of 66725260 is 6252766.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (66725261) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33064 + ... + 35023.

It is an arithmetic number, because the mean of its divisors is an integer number (4527852).

Almost surely, 2^66725260 is an apocalyptic number.

It is an amenable number.

66725260 is an abundant number, since it is smaller than the sum of its proper divisors (96277412).

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

66725260 is a wasteful number, since it uses less digits than its factorization.

66725260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68110 (or 68101 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 66725260 is about 8168.5531154544. The cubic root of 66725260 is about 405.5988904160.

The spelling of 66725260 in words is "sixty-six million, seven hundred twenty-five thousand, two hundred sixty".