67400406667 has 4 divisors (see below), whose sum is σ = 73527716376. Its totient is φ = 61273096960.

The previous prime is 67400406643. The next prime is 67400406679. The reversal of 67400406667 is 76660400476.

67400406667 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 67400406667 - 2¹⁹ = 67399882379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67400406167) 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, 3063654838 + ... + 3063654859.

It is an arithmetic number, because the mean of its divisors is an integer number (18381929094).

Almost surely, 2^67400406667 is an apocalyptic number.

67400406667 is a deficient number, since it is larger than the sum of its proper divisors (6127309709).

67400406667 is a wasteful number, since it uses less digits than its factorization.

67400406667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6127309708.

The product of its (nonzero) digits is 1016064, while the sum is 46.

The spelling of 67400406667 in words is "sixty-seven billion, four hundred million, four hundred six thousand, six hundred sixty-seven".