66675144 has 16 divisors (see below), whose sum is σ = 166687920. Its totient is φ = 22225040.

The previous prime is 66675109. The next prime is 66675157. The reversal of 66675144 is 44157666.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1389042 + ... + 1389089.

It is an arithmetic number, because the mean of its divisors is an integer number (10417995).

Almost surely, 2^66675144 is an apocalyptic number.

It is an amenable number.

66675144 is an abundant number, since it is smaller than the sum of its proper divisors (100012776).

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

66675144 is a wasteful number, since it uses less digits than its factorization.

66675144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2778140 (or 2778136 counting only the distinct ones).

The product of its digits is 120960, while the sum is 39.

The square root of 66675144 is about 8165.4849213014. The cubic root of 66675144 is about 405.4973192610.

It can be divided in two parts, 6667 and 5144, that added together give a palindrome (11811).

The spelling of 66675144 in words is "sixty-six million, six hundred seventy-five thousand, one hundred forty-four".