6690068367840 has 1440 divisors, whose sum is σ = 28290514678272. Its totient is φ = 1475615232000.

The previous prime is 6690068367839. The next prime is 6690068367841. The reversal of 6690068367840 is 487638600966.

It is an interprime number because it is at equal distance from previous prime (6690068367839) and next prime (6690068367841).

It is a tau number, because it is divible by the number of its divisors (1440).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6690068367841) by changing a digit.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 1710575485 + ... + 1710579395.

Almost surely, 2^{6690068367840} is an apocalyptic number.

6690068367840 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 6690068367840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14145257339136).

6690068367840 is an abundant number, since it is smaller than the sum of its proper divisors (21600446310432).

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

6690068367840 is a wasteful number, since it uses less digits than its factorization.

6690068367840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4046 (or 4016 counting only the distinct ones).

The product of its (nonzero) digits is 62705664, while the sum is 63.

The spelling of 6690068367840 in words is "six trillion, six hundred ninety billion, sixty-eight million, three hundred sixty-seven thousand, eight hundred forty".