67256605 has 16 divisors (see below), whose sum is σ = 89039664. Its totient is φ = 48453120.

The previous prime is 67256603. The next prime is 67256611. The reversal of 67256605 is 50665276.

It can be written as a sum of positive squares in 8 ways, for example, as 10374841 + 56881764 = 3221^2 + 7542^2 .

It is not a de Polignac number, because 67256605 - 2¹ = 67256603 is a prime.

It is a super-2 number, since 2×67256605² = 9046901832252050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67256603) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9954 + ... + 15283.

It is an arithmetic number, because the mean of its divisors is an integer number (5564979).

Almost surely, 2^67256605 is an apocalyptic number.

67256605 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

67256605 is a deficient number, since it is larger than the sum of its proper divisors (21783059).

67256605 is a wasteful number, since it uses less digits than its factorization.

67256605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25296.

The product of its (nonzero) digits is 75600, while the sum is 37.

The square root of 67256605 is about 8201.0124374982. The cubic root of 67256605 is about 406.6726636967.

The spelling of 67256605 in words is "sixty-seven million, two hundred fifty-six thousand, six hundred five".