66712542415 has 8 divisors (see below), whose sum is σ = 80071901280. Its totient is φ = 53358800352.

The previous prime is 66712542401. The next prime is 66712542443. The reversal of 66712542415 is 51424521766.

66712542415 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66712542415 is a prime.

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, 1378024 + ... + 1425613.

It is an arithmetic number, because the mean of its divisors is an integer number (10008987660).

Almost surely, 2^66712542415 is an apocalyptic number.

66712542415 is a deficient number, since it is larger than the sum of its proper divisors (13359358865).

66712542415 is a wasteful number, since it uses less digits than its factorization.

66712542415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2808401.

The product of its digits is 403200, while the sum is 43.

The spelling of 66712542415 in words is "sixty-six billion, seven hundred twelve million, five hundred forty-two thousand, four hundred fifteen".