67374721 has 4 divisors (see below), whose sum is σ = 67493700. Its totient is φ = 67255744.

The previous prime is 67374709. The next prime is 67374733. The reversal of 67374721 is 12747376.

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

It is an interprime number because it is at equal distance from previous prime (67374709) and next prime (67374733).

It can be written as a sum of positive squares in 2 ways, for example, as 37344321 + 30030400 = 6111^2 + 5480^2 .

It is a cyclic number.

It is not a de Polignac number, because 67374721 - 2¹¹ = 67372673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67374701) by changing a digit.

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, 58636 + ... + 59773.

It is an arithmetic number, because the mean of its divisors is an integer number (16873425).

Almost surely, 2^67374721 is an apocalyptic number.

It is an amenable number.

67374721 is a deficient number, since it is larger than the sum of its proper divisors (118979).

67374721 is a wasteful number, since it uses less digits than its factorization.

67374721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118978.

The product of its digits is 49392, while the sum is 37.

The square root of 67374721 is about 8208.2105845306. The cubic root of 67374721 is about 406.9105905458.

The spelling of 67374721 in words is "sixty-seven million, three hundred seventy-four thousand, seven hundred twenty-one".