67781376 has 216 divisors, whose sum is σ = 220228736. Its totient is φ = 19906560.

The previous prime is 67781359. The next prime is 67781377. The reversal of 67781376 is 67318776.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (67781377) 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, 928476 + ... + 928548.

Almost surely, 2^67781376 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 67781376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110114368).

67781376 is an abundant number, since it is smaller than the sum of its proper divisors (152447360).

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

67781376 is a wasteful number, since it uses less digits than its factorization.

67781376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139 (or 122 counting only the distinct ones).

The product of its digits is 296352, while the sum is 45.

The square root of 67781376 is about 8232.9445522243. The cubic root of 67781376 is about 407.7276151949.

The spelling of 67781376 in words is "sixty-seven million, seven hundred eighty-one thousand, three hundred seventy-six".