67654565 has 16 divisors (see below), whose sum is σ = 88744896. Its totient is φ = 49104000.

The previous prime is 67654549. The next prime is 67654567. The reversal of 67654565 is 56545676.

67654565 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is not a de Polignac number, because 67654565 - 2⁴ = 67654549 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67654567) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36665 + ... + 38465.

It is an arithmetic number, because the mean of its divisors is an integer number (5546556).

Almost surely, 2^67654565 is an apocalyptic number.

It is an amenable number.

67654565 is a deficient number, since it is larger than the sum of its proper divisors (21090331).

67654565 is a wasteful number, since it uses less digits than its factorization.

67654565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2500.

The product of its digits is 756000, while the sum is 44.

The square root of 67654565 is about 8225.2395101906. The cubic root of 67654565 is about 407.4731862869.

Subtracting from 67654565 its reverse (56545676), we obtain a square (11108889 = 3333²).

The spelling of 67654565 in words is "sixty-seven million, six hundred fifty-four thousand, five hundred sixty-five".