66761375414015 has 8 divisors (see below), whose sum is σ = 80128352979600. Its totient is φ = 53399298676032.

The previous prime is 66761375413991. The next prime is 66761375414047. The reversal of 66761375414015 is 51041457316766.

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

It is a cyclic number.

It is not a de Polignac number, because 66761375414015 - 2¹⁴ = 66761375397631 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, 1225176929 + ... + 1225231418.

It is an arithmetic number, because the mean of its divisors is an integer number (10016044122450).

Almost surely, 2^{66761375414015} is an apocalyptic number.

66761375414015 is a deficient number, since it is larger than the sum of its proper divisors (13366977565585).

66761375414015 is a wasteful number, since it uses less digits than its factorization.

66761375414015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2450413801.

The product of its (nonzero) digits is 12700800, while the sum is 56.

The spelling of 66761375414015 in words is "sixty-six trillion, seven hundred sixty-one billion, three hundred seventy-five million, four hundred fourteen thousand, fifteen".