86665407 has 4 divisors (see below), whose sum is σ = 115553880. Its totient is φ = 57776936.

The previous prime is 86665387. The next prime is 86665417. The reversal of 86665407 is 70456668.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 86665407 - 2¹⁵ = 86632639 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86665417) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14444232 + ... + 14444237.

It is an arithmetic number, because the mean of its divisors is an integer number (28888470).

Almost surely, 2^86665407 is an apocalyptic number.

86665407 is a deficient number, since it is larger than the sum of its proper divisors (28888473).

86665407 is a wasteful number, since it uses less digits than its factorization.

86665407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28888472.

The product of its (nonzero) digits is 241920, while the sum is 42.

The square root of 86665407 is about 9309.4257073141. The cubic root of 86665407 is about 442.5359873697.

The spelling of 86665407 in words is "eighty-six million, six hundred sixty-five thousand, four hundred seven".