656432400067 has 4 divisors (see below), whose sum is σ = 671698269880. Its totient is φ = 641166530256.

The previous prime is 656432400017. The next prime is 656432400139. The reversal of 656432400067 is 760004234656.

656432400067 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 656432400067 - 2¹⁵ = 656432367299 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43), and also a Moran number because the ratio is a prime number: 15265869769 = 656432400067 / (6 + 5 + 6 + 4 + 3 + 2 + 4 + 0 + 0 + 0 + 6 + 7).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 656432399996 and 656432400032.

It is not an unprimeable number, because it can be changed into a prime (656432400017) 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, 7632934842 + ... + 7632934927.

It is an arithmetic number, because the mean of its divisors is an integer number (167924567470).

Almost surely, 2^656432400067 is an apocalyptic number.

656432400067 is a deficient number, since it is larger than the sum of its proper divisors (15265869813).

656432400067 is a wasteful number, since it uses less digits than its factorization.

656432400067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15265869812.

The product of its (nonzero) digits is 725760, while the sum is 43.

The spelling of 656432400067 in words is "six hundred fifty-six billion, four hundred thirty-two million, four hundred thousand, sixty-seven".