850166749 has 4 divisors (see below), whose sum is σ = 853068636. Its totient is φ = 847264864.

The previous prime is 850166747. The next prime is 850166767. The reversal of 850166749 is 947661058.

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

It can be written as a sum of positive squares in 2 ways, for example, as 806844025 + 43322724 = 28405^2 + 6582^2 .

It is a cyclic number.

It is not a de Polignac number, because 850166749 - 2¹ = 850166747 is a prime.

It is a super-2 number, since 2×850166749² = 1445567002210458002, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 850166699 and 850166708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (850166741) 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, 1450504 + ... + 1451089.

It is an arithmetic number, because the mean of its divisors is an integer number (213267159).

Almost surely, 2^850166749 is an apocalyptic number.

It is an amenable number.

850166749 is a deficient number, since it is larger than the sum of its proper divisors (2901887).

850166749 is a wasteful number, since it uses less digits than its factorization.

850166749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2901886.

The product of its (nonzero) digits is 362880, while the sum is 46.

The square root of 850166749 is about 29157.6190557460. The cubic root of 850166749 is about 947.3301766774.

The spelling of 850166749 in words is "eight hundred fifty million, one hundred sixty-six thousand, seven hundred forty-nine".