67478643 has 16 divisors (see below), whose sum is σ = 101095200. Its totient is φ = 44478720.

The previous prime is 67478641. The next prime is 67478647. The reversal of 67478643 is 34687476.

It is not a de Polignac number, because 67478643 - 2¹ = 67478641 is a prime.

It is a super-2 number, since 2×67478643² = 9106734522242898, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (67478641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11638 + ... + 16443.

It is an arithmetic number, because the mean of its divisors is an integer number (6318450).

Almost surely, 2^67478643 is an apocalyptic number.

67478643 is a deficient number, since it is larger than the sum of its proper divisors (33616557).

67478643 is a wasteful number, since it uses less digits than its factorization.

67478643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28179 (or 28173 counting only the distinct ones).

The product of its digits is 677376, while the sum is 45.

The square root of 67478643 is about 8214.5385141224. The cubic root of 67478643 is about 407.1196958728.

It can be divided in two parts, 67478 and 643, that added together give a square (68121 = 261²).

The spelling of 67478643 in words is "sixty-seven million, four hundred seventy-eight thousand, six hundred forty-three".