1667427072000 has 384 divisors, whose sum is σ = 5564633256000. Its totient is φ = 443301888000.

The previous prime is 1667427071977. The next prime is 1667427072071. The reversal of 1667427072000 is 2707247661.

It is a tau number, because it is divible by the number of its divisors (384).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 268028890 + ... + 268035110.

Almost surely, 2^{1667427072000} is an apocalyptic number.

1667427072000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1667427072000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2782316628000).

1667427072000 is an abundant number, since it is smaller than the sum of its proper divisors (3897206184000).

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

1667427072000 is an equidigital number, since it uses as much as digits as its factorization.

1667427072000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6610 (or 6580 counting only the distinct ones).

The product of its (nonzero) digits is 197568, while the sum is 42.

The spelling of 1667427072000 in words is "one trillion, six hundred sixty-seven billion, four hundred twenty-seven million, seventy-two thousand".