66749124 has 24 divisors (see below), whose sum is σ = 167728960. Its totient is φ = 20538144.

The previous prime is 66749117. The next prime is 66749131. The reversal of 66749124 is 42194766.

It is a happy number.

66749124 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (66749117) and next prime (66749131).

It is a Harshad number since it is a multiple of its sum of digits (39).

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 7 ways as a sum of consecutive naturals, for example, 213784 + ... + 214095.

Almost surely, 2^66749124 is an apocalyptic number.

It is an amenable number.

66749124 is an abundant number, since it is smaller than the sum of its proper divisors (100979836).

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

66749124 is a wasteful number, since it uses less digits than its factorization.

66749124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427899 (or 427897 counting only the distinct ones).

The product of its digits is 72576, while the sum is 39.

The square root of 66749124 is about 8170.0137086788. The cubic root of 66749124 is about 405.6472382144.

The spelling of 66749124 in words is "sixty-six million, seven hundred forty-nine thousand, one hundred twenty-four".