67920686 has 8 divisors (see below), whose sum is σ = 102078144. Its totient is φ = 33894640.

The previous prime is 67920673. The next prime is 67920707. The reversal of 67920686 is 68602976.

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

It is a super-2 number, since 2×67920686² = 9226439173421192, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31550 + ... + 33633.

It is an arithmetic number, because the mean of its divisors is an integer number (12759768).

Almost surely, 2^67920686 is an apocalyptic number.

67920686 is a deficient number, since it is larger than the sum of its proper divisors (34157458).

67920686 is a wasteful number, since it uses less digits than its factorization.

67920686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65706.

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 67920686 is about 8241.4007304584. The cubic root of 67920686 is about 408.0067561037.

The spelling of 67920686 in words is "sixty-seven million, nine hundred twenty thousand, six hundred eighty-six".