67688361 has 12 divisors (see below), whose sum is σ = 105293188. Its totient is φ = 41654304.

The previous prime is 67688359. The next prime is 67688371. The reversal of 67688361 is 16388676.

It can be written as a sum of positive squares in 2 ways, for example, as 41525136 + 26163225 = 6444^2 + 5115^2 .

It is not a de Polignac number, because 67688361 - 2¹ = 67688359 is a prime.

It is not an unprimeable number, because it can be changed into a prime (67688351) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 289150 + ... + 289383.

Almost surely, 2^67688361 is an apocalyptic number.

It is an amenable number.

67688361 is a deficient number, since it is larger than the sum of its proper divisors (37604827).

67688361 is a wasteful number, since it uses less digits than its factorization.

67688361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 578552 (or 578549 counting only the distinct ones).

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

The square root of 67688361 is about 8227.2936619523. The cubic root of 67688361 is about 407.5410243867.

It can be divided in two parts, 6768 and 8361, that added together give a square (15129 = 123²).

The spelling of 67688361 in words is "sixty-seven million, six hundred eighty-eight thousand, three hundred sixty-one".