67638146 has 16 divisors (see below), whose sum is σ = 104569920. Its totient is φ = 32788080.

The previous prime is 67638107. The next prime is 67638149. The reversal of 67638146 is 64183676.

It is not an unprimeable number, because it can be changed into a prime (67638149) 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 7 ways as a sum of consecutive naturals, for example, 21545 + ... + 24483.

It is an arithmetic number, because the mean of its divisors is an integer number (6535620).

Almost surely, 2^67638146 is an apocalyptic number.

67638146 is a deficient number, since it is larger than the sum of its proper divisors (36931774).

67638146 is a wasteful number, since it uses less digits than its factorization.

67638146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3289.

The product of its digits is 145152, while the sum is 41.

The square root of 67638146 is about 8224.2413631897. The cubic root of 67638146 is about 407.4402205709.

The spelling of 67638146 in words is "sixty-seven million, six hundred thirty-eight thousand, one hundred forty-six".