67256680 has 32 divisors (see below), whose sum is σ = 151570440. Its totient is φ = 26859520.

The previous prime is 67256659. The next prime is 67256681. The reversal of 67256680 is 8665276.

It can be written as a sum of positive squares in 4 ways, for example, as 66879684 + 376996 = 8178^2 + 614^2 .

It is a super-2 number, since 2×67256680² = 9046922009244800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (67256681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38220 + ... + 39940.

Almost surely, 2^67256680 is an apocalyptic number.

It is an amenable number.

67256680 is an abundant number, since it is smaller than the sum of its proper divisors (84313760).

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

67256680 is a wasteful number, since it uses less digits than its factorization.

67256680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2709 (or 2705 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 67256680 is about 8201.0170101031. The cubic root of 67256680 is about 406.6728148612.

The spelling of 67256680 in words is "sixty-seven million, two hundred fifty-six thousand, six hundred eighty".