66707418 has 8 divisors (see below), whose sum is σ = 133414848. Its totient is φ = 22235804.

The previous prime is 66707413. The next prime is 66707419. The reversal of 66707418 is 81470766.

It is a sphenic number, since it is the product of 3 distinct primes.

66707418 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (66707413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5558946 + ... + 5558957.

It is an arithmetic number, because the mean of its divisors is an integer number (16676856).

Almost surely, 2^66707418 is an apocalyptic number.

66707418 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

66707418 is a wasteful number, since it uses less digits than its factorization.

66707418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11117908.

The product of its (nonzero) digits is 56448, while the sum is 39.

The square root of 66707418 is about 8167.4609273629. The cubic root of 66707418 is about 405.5627354900.

The spelling of 66707418 in words is "sixty-six million, seven hundred seven thousand, four hundred eighteen".