67491648 has 168 divisors, whose sum is σ = 232989120. Its totient is φ = 18247680.

The previous prime is 67491647. The next prime is 67491659. The reversal of 67491648 is 84619476.

It is a tau number, because it is divible by the number of its divisors (168).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67491647) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 76168 + ... + 77048.

It is an arithmetic number, because the mean of its divisors is an integer number (1386840).

Almost surely, 2^67491648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 67491648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116494560).

67491648 is an abundant number, since it is smaller than the sum of its proper divisors (165497472).

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

67491648 is a wasteful number, since it uses less digits than its factorization.

67491648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 925 (or 912 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 67491648 is about 8215.3300603202. The cubic root of 67491648 is about 407.1458485996.

The spelling of 67491648 in words is "sixty-seven million, four hundred ninety-one thousand, six hundred forty-eight".