67664442 has 8 divisors (see below), whose sum is σ = 135328896. Its totient is φ = 22554812.

The previous prime is 67664423. The next prime is 67664461. The reversal of 67664442 is 24446676.

It is an interprime number because it is at equal distance from previous prime (67664423) and next prime (67664461).

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

67664442 is an admirable number.

It is a super-2 number, since 2×67664442² = 9156953422342728, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 67664442.

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, 5638698 + ... + 5638709.

It is an arithmetic number, because the mean of its divisors is an integer number (16916112).

Almost surely, 2^67664442 is an apocalyptic number.

67664442 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

67664442 is a wasteful number, since it uses less digits than its factorization.

67664442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11277412.

The product of its digits is 193536, while the sum is 39.

The square root of 67664442 is about 8225.8398963267. The cubic root of 67664442 is about 407.4930145465.

The spelling of 67664442 in words is "sixty-seven million, six hundred sixty-four thousand, four hundred forty-two".