67066657665 has 16 divisors (see below), whose sum is σ = 122636174208. Its totient is φ = 30659043456.

The previous prime is 67066657657. The next prime is 67066657667. The reversal of 67066657665 is 56675666076.

It is not a de Polignac number, because 67066657665 - 2³ = 67066657657 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 67066657599 and 67066657608.

It is not an unprimeable number, because it can be changed into a prime (67066657667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 319364932 + ... + 319365141.

It is an arithmetic number, because the mean of its divisors is an integer number (7664760888).

Almost surely, 2^67066657665 is an apocalyptic number.

It is an amenable number.

67066657665 is a deficient number, since it is larger than the sum of its proper divisors (55569516543).

67066657665 is a wasteful number, since it uses less digits than its factorization.

67066657665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 638730088.

The product of its (nonzero) digits is 57153600, while the sum is 60.

The spelling of 67066657665 in words is "sixty-seven billion, sixty-six million, six hundred fifty-seven thousand, six hundred sixty-five".