67668400738571 has 4 divisors (see below), whose sum is σ = 67668763624200. Its totient is φ = 67668037852944.

The previous prime is 67668400738439. The next prime is 67668400738577. The reversal of 67668400738571 is 17583700486676.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 67668400738571 - 2¹⁸ = 67668400476427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67668400738577) 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, 181162961 + ... + 181536098.

It is an arithmetic number, because the mean of its divisors is an integer number (16917190906050).

Almost surely, 2^{67668400738571} is an apocalyptic number.

67668400738571 is a deficient number, since it is larger than the sum of its proper divisors (362885629).

67668400738571 is a wasteful number, since it uses less digits than its factorization.

67668400738571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362885628.

The product of its (nonzero) digits is 284497920, while the sum is 68.

The spelling of 67668400738571 in words is "sixty-seven trillion, six hundred sixty-eight billion, four hundred million, seven hundred thirty-eight thousand, five hundred seventy-one".