66375412 has 12 divisors (see below), whose sum is σ = 122989860. Its totient is φ = 31235456.

The previous prime is 66375391. The next prime is 66375427. The reversal of 66375412 is 21457366.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 44435556 + 21939856 = 6666^2 + 4684^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

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, 487987 + ... + 488122.

It is an arithmetic number, because the mean of its divisors is an integer number (10249155).

Almost surely, 2^66375412 is an apocalyptic number.

It is an amenable number.

66375412 is a deficient number, since it is larger than the sum of its proper divisors (56614448).

66375412 is a wasteful number, since it uses less digits than its factorization.

66375412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 976130 (or 976128 counting only the distinct ones).

The product of its digits is 30240, while the sum is 34.

The square root of 66375412 is about 8147.1106534771. The cubic root of 66375412 is about 404.8887811254. Note that the first 3 decimals are identical.

The spelling of 66375412 in words is "sixty-six million, three hundred seventy-five thousand, four hundred twelve".