67699666944 has 936 divisors, whose sum is σ = 259626522960. Its totient is φ = 17278894080.

The previous prime is 67699666907. The next prime is 67699667059. The reversal of 67699666944 is 44966699676.

It is a tau number, because it is divible by the number of its divisors (936).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a nude number because it is divisible by every one of its digits.

Its product of digits (634894848) is a multiple of the sum of its prime divisors (56).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2183860209 + ... + 2183860239.

Almost surely, 2^67699666944 is an apocalyptic number.

67699666944 is a gapful number since it is divisible by the number (64) 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 67699666944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129813261480).

67699666944 is an abundant number, since it is smaller than the sum of its proper divisors (191926856016).

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

67699666944 is a wasteful number, since it uses less digits than its factorization.

67699666944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122 (or 56 counting only the distinct ones).

The product of its digits is 634894848, while the sum is 72.

The spelling of 67699666944 in words is "sixty-seven billion, six hundred ninety-nine million, six hundred sixty-six thousand, nine hundred forty-four".