66760215 has 8 divisors (see below), whose sum is σ = 106816368. Its totient is φ = 35605440.

The previous prime is 66760159. The next prime is 66760219. The reversal of 66760215 is 51206766.

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

It is not a de Polignac number, because 66760215 - 2⁹ = 66759703 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66760219) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 2225326 + ... + 2225355.

It is an arithmetic number, because the mean of its divisors is an integer number (13352046).

Almost surely, 2^66760215 is an apocalyptic number.

66760215 is a deficient number, since it is larger than the sum of its proper divisors (40056153).

66760215 is a wasteful number, since it uses less digits than its factorization.

66760215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4450689.

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 66760215 is about 8170.6924431164. The cubic root of 66760215 is about 405.6697043487.

The spelling of 66760215 in words is "sixty-six million, seven hundred sixty thousand, two hundred fifteen".