850013661 has 16 divisors (see below), whose sum is σ = 1298743424. Its totient is φ = 484415424.

The previous prime is 850013639. The next prime is 850013687. The reversal of 850013661 is 166310058.

It is not a de Polignac number, because 850013661 - 2⁶ = 850013597 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 (850013261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46426 + ... + 62091.

It is an arithmetic number, because the mean of its divisors is an integer number (81171464).

Almost surely, 2^850013661 is an apocalyptic number.

It is an amenable number.

850013661 is a deficient number, since it is larger than the sum of its proper divisors (448729763).

850013661 is a wasteful number, since it uses less digits than its factorization.

850013661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108900.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 850013661 is about 29154.9937575023. The cubic root of 850013661 is about 947.2733119161.

The spelling of 850013661 in words is "eight hundred fifty million, thirteen thousand, six hundred sixty-one".