66551392 has 24 divisors (see below), whose sum is σ = 132606936. Its totient is φ = 32873472.

The previous prime is 66551377. The next prime is 66551423. The reversal of 66551392 is 29315566.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9873 + ... + 15184.

It is an arithmetic number, because the mean of its divisors is an integer number (5525289).

Almost surely, 2^66551392 is an apocalyptic number.

It is an amenable number.

66551392 is a deficient number, since it is larger than the sum of its proper divisors (66055544).

66551392 is a wasteful number, since it uses less digits than its factorization.

66551392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25150 (or 25142 counting only the distinct ones).

The product of its digits is 48600, while the sum is 37.

The square root of 66551392 is about 8157.9036522871. The cubic root of 66551392 is about 405.2462902698.

The spelling of 66551392 in words is "sixty-six million, five hundred fifty-one thousand, three hundred ninety-two".