67343497984 has 72 divisors (see below), whose sum is σ = 154305059328. Its totient is φ = 28734182400.

The previous prime is 67343497957. The next prime is 67343497987. The reversal of 67343497984 is 48979434376.

It is a Harshad number since it is a multiple of its sum of digits (64).

It is not an unprimeable number, because it can be changed into a prime (67343497987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 324009 + ... + 489559.

It is an arithmetic number, because the mean of its divisors is an integer number (2143125824).

Almost surely, 2^67343497984 is an apocalyptic number.

67343497984 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 67343497984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77152529664).

67343497984 is an abundant number, since it is smaller than the sum of its proper divisors (86961561344).

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

67343497984 is a wasteful number, since it uses less digits than its factorization.

67343497984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165801 (or 165787 counting only the distinct ones).

The product of its digits is 109734912, while the sum is 64.

The spelling of 67343497984 in words is "sixty-seven billion, three hundred forty-three million, four hundred ninety-seven thousand, nine hundred eighty-four".