67724545 has 8 divisors (see below), whose sum is σ = 92879424. Its totient is φ = 46439664.

The previous prime is 67724543. The next prime is 67724551. The reversal of 67724545 is 54542776.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 67724545 - 2¹ = 67724543 is a prime.

It is a super-2 number, since 2×67724545² = 9173227990914050, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 67724498 and 67724507.

It is not an unprimeable number, because it can be changed into a prime (67724543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 967459 + ... + 967528.

It is an arithmetic number, because the mean of its divisors is an integer number (11609928).

Almost surely, 2^67724545 is an apocalyptic number.

It is an amenable number.

67724545 is a deficient number, since it is larger than the sum of its proper divisors (25154879).

67724545 is a wasteful number, since it uses less digits than its factorization.

67724545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1934999.

The product of its digits is 235200, while the sum is 40.

The square root of 67724545 is about 8229.4923901781. The cubic root of 67724545 is about 407.6136308503.

The spelling of 67724545 in words is "sixty-seven million, seven hundred twenty-four thousand, five hundred forty-five".