86665405 has 16 divisors (see below), whose sum is σ = 110372544. Its totient is φ = 65102080.

The previous prime is 86665387. The next prime is 86665417. The reversal of 86665405 is 50456668.

It is not a de Polignac number, because 86665405 - 2¹⁷ = 86534333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46950 + ... + 48760.

It is an arithmetic number, because the mean of its divisors is an integer number (6898284).

Almost surely, 2^86665405 is an apocalyptic number.

86665405 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

86665405 is a deficient number, since it is larger than the sum of its proper divisors (23707139).

86665405 is a wasteful number, since it uses less digits than its factorization.

86665405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2396.

The product of its (nonzero) digits is 172800, while the sum is 40.

The square root of 86665405 is about 9309.4255998961. The cubic root of 86665405 is about 442.5359839655.

The spelling of 86665405 in words is "eighty-six million, six hundred sixty-five thousand, four hundred five".