67665705 has 16 divisors (see below), whose sum is σ = 108513024. Its totient is φ = 36005760.

The previous prime is 67665691. The next prime is 67665709. The reversal of 67665705 is 50756676.

It is not a de Polignac number, because 67665705 - 2⁵ = 67665673 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (67665709) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1920 + ... + 11790.

It is an arithmetic number, because the mean of its divisors is an integer number (6782064).

Almost surely, 2^67665705 is an apocalyptic number.

It is an amenable number.

67665705 is a deficient number, since it is larger than the sum of its proper divisors (40847319).

67665705 is a wasteful number, since it uses less digits than its factorization.

67665705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10336.

The product of its (nonzero) digits is 264600, while the sum is 42.

The square root of 67665705 is about 8225.9166662446. The cubic root of 67665705 is about 407.4955499031.

The spelling of 67665705 in words is "sixty-seven million, six hundred sixty-five thousand, seven hundred five".