67996567 has 4 divisors (see below), whose sum is σ = 68013400. Its totient is φ = 67979736.

The previous prime is 67996559. The next prime is 67996589. The reversal of 67996567 is 76569976.

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

It is a 3-Lehmer number, since φ(67996567) divides (67996567-1)³.

It is a cyclic number.

It is not a de Polignac number, because 67996567 - 2³ = 67996559 is a prime.

It is a deceptive number, since it divides R_67996566.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67990567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1684 + ... + 11782.

It is an arithmetic number, because the mean of its divisors is an integer number (17003350).

Almost surely, 2^67996567 is an apocalyptic number.

67996567 is the 6733-rd pentagonal number.

67996567 is a deficient number, since it is larger than the sum of its proper divisors (16833).

67996567 is a wasteful number, since it uses less digits than its factorization.

67996567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16832.

The product of its digits is 4286520, while the sum is 55.

The square root of 67996567 is about 8246.0030924079. The cubic root of 67996567 is about 408.1586412909.

It can be divided in two parts, 6799 and 6567, that added together give a triangular number (13366 = T₁₆₃).

The spelling of 67996567 in words is "sixty-seven million, nine hundred ninety-six thousand, five hundred sixty-seven".