400667340667 has 4 divisors (see below), whose sum is σ = 437091644376. Its totient is φ = 364243036960.

The previous prime is 400667340653. The next prime is 400667340679. The reversal of 400667340667 is 766043766004.

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

It is not a de Polignac number, because 400667340667 - 2¹⁵ = 400667307899 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 400667340667.

It is not an unprimeable number, because it can be changed into a prime (400667340467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18212151838 + ... + 18212151859.

It is an arithmetic number, because the mean of its divisors is an integer number (109272911094).

Almost surely, 2^400667340667 is an apocalyptic number.

400667340667 is a deficient number, since it is larger than the sum of its proper divisors (36424303709).

400667340667 is a wasteful number, since it uses less digits than its factorization.

400667340667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36424303708.

The product of its (nonzero) digits is 3048192, while the sum is 49.

The spelling of 400667340667 in words is "four hundred billion, six hundred sixty-seven million, three hundred forty thousand, six hundred sixty-seven".