67740705 has 20 divisors (see below), whose sum is σ = 121432212. Its totient is φ = 36128160.

The previous prime is 67740703. The next prime is 67740709. The reversal of 67740705 is 50704776.

It can be written as a sum of positive squares in 2 ways, for example, as 37896336 + 29844369 = 6156^2 + 5463^2 .

It is not a de Polignac number, because 67740705 - 2¹ = 67740703 is a prime.

It is a super-2 number, since 2×67740705² = 9177606227794050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 67740705.

It is not an unprimeable number, because it can be changed into a prime (67740703) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 83226 + ... + 84035.

Almost surely, 2^67740705 is an apocalyptic number.

It is an amenable number.

67740705 is a deficient number, since it is larger than the sum of its proper divisors (53691507).

67740705 is a wasteful number, since it uses less digits than its factorization.

67740705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167278 (or 167269 counting only the distinct ones).

The product of its (nonzero) digits is 41160, while the sum is 36.

The square root of 67740705 is about 8230.4741661705. The cubic root of 67740705 is about 407.6460489956.

The spelling of 67740705 in words is "sixty-seven million, seven hundred forty thousand, seven hundred five".