67371944640 has 672 divisors, whose sum is σ = 288833942016. Its totient is φ = 12920094720.

The previous prime is 67371944621. The next prime is 67371944663. The reversal of 67371944640 is 4644917376.

It is a tau number, because it is divible by the number of its divisors (672).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 12489784 + ... + 12495176.

Almost surely, 2^67371944640 is an apocalyptic number.

67371944640 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 67371944640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (144416971008).

67371944640 is an abundant number, since it is smaller than the sum of its proper divisors (221461997376).

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

67371944640 is a wasteful number, since it uses less digits than its factorization.

67371944640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5457 (or 5434 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 51.

The spelling of 67371944640 in words is "sixty-seven billion, three hundred seventy-one million, nine hundred forty-four thousand, six hundred forty".