67660665 has 8 divisors (see below), whose sum is σ = 108257088. Its totient is φ = 36085680.

The previous prime is 67660643. The next prime is 67660667. The reversal of 67660665 is 56606676.

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

It is not a de Polignac number, because 67660665 - 2⁵ = 67660633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (67660667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2255341 + ... + 2255370.

It is an arithmetic number, because the mean of its divisors is an integer number (13532136).

Almost surely, 2^67660665 is an apocalyptic number.

It is an amenable number.

67660665 is a deficient number, since it is larger than the sum of its proper divisors (40596423).

67660665 is a wasteful number, since it uses less digits than its factorization.

67660665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4510719.

The product of its (nonzero) digits is 272160, while the sum is 42.

The square root of 67660665 is about 8225.6103117033. The cubic root of 67660665 is about 407.4854323772.

The spelling of 67660665 in words is "sixty-seven million, six hundred sixty thousand, six hundred sixty-five".