667043520000 has 1600 divisors, whose sum is σ = 2693106130176. Its totient is φ = 144506880000.

The previous prime is 667043519963. The next prime is 667043520001. The reversal of 667043520000 is 25340766.

It is a tau number, because it is divible by the number of its divisors (1600).

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667043520001) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 5903039944 + ... + 5903040056.

Almost surely, 2^667043520000 is an apocalyptic number.

667043520000 is a gapful number since it is divisible by the number (60) 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 667043520000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1346553065088).

667043520000 is an abundant number, since it is smaller than the sum of its proper divisors (2026062610176).

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

667043520000 is a wasteful number, since it uses less digits than its factorization.

667043520000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221 (or 190 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 33.

Adding to 667043520000 its reverse (25340766), we get a palindrome (667068860766).

The spelling of 667043520000 in words is "six hundred sixty-seven billion, forty-three million, five hundred twenty thousand".