406674420879 has 4 divisors (see below), whose sum is σ = 542232561176. Its totient is φ = 271116280584.

The previous prime is 406674420851. The next prime is 406674420883. The reversal of 406674420879 is 978024476604.

It is a happy number.

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

It is not a de Polignac number, because 406674420879 - 2¹¹ = 406674418831 is a prime.

It is a super-2 number, since 2×406674420879² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406674420809) 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, 67779070144 + ... + 67779070149.

It is an arithmetic number, because the mean of its divisors is an integer number (135558140294).

Almost surely, 2^406674420879 is an apocalyptic number.

406674420879 is a deficient number, since it is larger than the sum of its proper divisors (135558140297).

406674420879 is a wasteful number, since it uses less digits than its factorization.

406674420879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135558140296.

The product of its (nonzero) digits is 16257024, while the sum is 57.

The spelling of 406674420879 in words is "four hundred six billion, six hundred seventy-four million, four hundred twenty thousand, eight hundred seventy-nine".