67400705 has 4 divisors (see below), whose sum is σ = 80880852. Its totient is φ = 53920560.

The previous prime is 67400693. The next prime is 67400713. The reversal of 67400705 is 50700476.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 32069569 + 35331136 = 5663^2 + 5944^2 .

It is not a de Polignac number, because 67400705 - 2⁴ = 67400689 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 6740066 + ... + 6740075.

It is an arithmetic number, because the mean of its divisors is an integer number (20220213).

Almost surely, 2^67400705 is an apocalyptic number.

It is an amenable number.

67400705 is a deficient number, since it is larger than the sum of its proper divisors (13480147).

67400705 is a wasteful number, since it uses less digits than its factorization.

67400705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13480146.

The product of its (nonzero) digits is 5880, while the sum is 29.

The square root of 67400705 is about 8209.7932373477. The cubic root of 67400705 is about 406.9628940690.

The spelling of 67400705 in words is "sixty-seven million, four hundred thousand, seven hundred five".