3665717861 has 8 divisors (see below), whose sum is σ = 4155469920. Its totient is φ = 3205647792.

The previous prime is 3665717833. The next prime is 3665717863. The reversal of 3665717861 is 1687175663.

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

It is a cyclic number.

It is not a de Polignac number, because 3665717861 - 2²⁶ = 3598608997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3665717863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7420235 + ... + 7420728.

It is an arithmetic number, because the mean of its divisors is an integer number (519433740).

Almost surely, 2^3665717861 is an apocalyptic number.

It is an amenable number.

3665717861 is a deficient number, since it is larger than the sum of its proper divisors (489752059).

3665717861 is a wasteful number, since it uses less digits than its factorization.

3665717861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14840995.

The product of its digits is 1270080, while the sum is 50.

The square root of 3665717861 is about 60545.1720701164. The cubic root of 3665717861 is about 1541.8886510808. Note that the first 3 decimals are identical.

The spelling of 3665717861 in words is "three billion, six hundred sixty-five million, seven hundred seventeen thousand, eight hundred sixty-one".