1421666431854 has 8 divisors (see below), whose sum is σ = 2843332863720. Its totient is φ = 473888810616.

The previous prime is 1421666431831. The next prime is 1421666431879. The reversal of 1421666431854 is 4581346661241.

It is a sphenic number, since it is the product of 3 distinct primes.

1421666431854 is an admirable number.

It is a super-2 number, since 2×1421666431854² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1421666431797 and 1421666431806.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118472202649 + ... + 118472202660.

It is an arithmetic number, because the mean of its divisors is an integer number (355416607965).

Almost surely, 2^{1421666431854} is an apocalyptic number.

1421666431854 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1421666431854 is a wasteful number, since it uses less digits than its factorization.

1421666431854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236944405314.

The product of its digits is 3317760, while the sum is 51.

The spelling of 1421666431854 in words is "one trillion, four hundred twenty-one billion, six hundred sixty-six million, four hundred thirty-one thousand, eight hundred fifty-four".