66507412 has 24 divisors (see below), whose sum is σ = 122012352. Its totient is φ = 31684800.

The previous prime is 66507407. The next prime is 66507433. The reversal of 66507412 is 21470566.

It is a happy number.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2337 + ... + 11767.

It is an arithmetic number, because the mean of its divisors is an integer number (5083848).

Almost surely, 2^66507412 is an apocalyptic number.

It is an amenable number.

66507412 is a deficient number, since it is larger than the sum of its proper divisors (55504940).

66507412 is a wasteful number, since it uses less digits than its factorization.

66507412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9519 (or 9517 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 66507412 is about 8155.2076613658. The cubic root of 66507412 is about 405.1570025842.

Adding to 66507412 its reverse (21470566), we get a palindrome (87977978).

The spelling of 66507412 in words is "sixty-six million, five hundred seven thousand, four hundred twelve".