67099670640 has 240 divisors, whose sum is σ = 227891664000. Its totient is φ = 17692028928.

The previous prime is 67099670569. The next prime is 67099670641. The reversal of 67099670640 is 4607699076.

It is a tau number, because it is divible by the number of its divisors (240).

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67099670641) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 25638612 + ... + 25641228.

It is an arithmetic number, because the mean of its divisors is an integer number (949548600).

Almost surely, 2^67099670640 is an apocalyptic number.

67099670640 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 67099670640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113945832000).

67099670640 is an abundant number, since it is smaller than the sum of its proper divisors (160791993360).

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

67099670640 is a wasteful number, since it uses less digits than its factorization.

67099670640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3024 (or 3015 counting only the distinct ones).

The product of its (nonzero) digits is 3429216, while the sum is 54.

The spelling of 67099670640 in words is "sixty-seven billion, ninety-nine million, six hundred seventy thousand, six hundred forty".