66180744 has 48 divisors (see below), whose sum is σ = 204846720. Its totient is φ = 18908640.

The previous prime is 66180739. The next prime is 66180761. The reversal of 66180744 is 44708166.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 66180699 and 66180708.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 65152 + ... + 66159.

It is an arithmetic number, because the mean of its divisors is an integer number (4267640).

Almost surely, 2^66180744 is an apocalyptic number.

It is an amenable number.

66180744 is an abundant number, since it is smaller than the sum of its proper divisors (138665976).

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

66180744 is a wasteful number, since it uses less digits than its factorization.

66180744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131330 (or 131323 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 66180744 is about 8135.1548233577. The cubic root of 66180744 is about 404.4925698032.

The spelling of 66180744 in words is "sixty-six million, one hundred eighty thousand, seven hundred forty-four".