66656124 has 18 divisors (see below), whose sum is σ = 168491960. Its totient is φ = 22218696.

The previous prime is 66656111. The next prime is 66656131. The reversal of 66656124 is 42165666.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 1851559 = 66656124 / (6 + 6 + 6 + 5 + 6 + 1 + 2 + 4).

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 5 ways as a sum of consecutive naturals, for example, 925744 + ... + 925815.

Almost surely, 2^66656124 is an apocalyptic number.

It is an amenable number.

66656124 is an abundant number, since it is smaller than the sum of its proper divisors (101835836).

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

66656124 is a wasteful number, since it uses less digits than its factorization.

66656124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1851569 (or 1851564 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 66656124 is about 8164.3201799048. The cubic root of 66656124 is about 405.4587577020.

The spelling of 66656124 in words is "sixty-six million, six hundred fifty-six thousand, one hundred twenty-four".