67438665 has 24 divisors (see below), whose sum is σ = 133593408. Its totient is φ = 30828960.

The previous prime is 67438633. The next prime is 67438673. The reversal of 67438665 is 56683476.

It is not a de Polignac number, because 67438665 - 2⁵ = 67438633 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 67438665.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 106731 + ... + 107360.

It is an arithmetic number, because the mean of its divisors is an integer number (5566392).

Almost surely, 2^67438665 is an apocalyptic number.

It is an amenable number.

67438665 is a deficient number, since it is larger than the sum of its proper divisors (66154743).

67438665 is a wasteful number, since it uses less digits than its factorization.

67438665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214109 (or 214106 counting only the distinct ones).

The product of its digits is 725760, while the sum is 45.

The square root of 67438665 is about 8212.1047850110. The cubic root of 67438665 is about 407.0392800762.

The spelling of 67438665 in words is "sixty-seven million, four hundred thirty-eight thousand, six hundred sixty-five".