846666749 has 4 divisors (see below), whose sum is σ = 846761664. Its totient is φ = 846571836.

The previous prime is 846666721. The next prime is 846666757. The reversal of 846666749 is 947666648.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-846666749 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 846666694 and 846666703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (846666719) 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, 32507 + ... + 52440.

It is an arithmetic number, because the mean of its divisors is an integer number (211690416).

Almost surely, 2^846666749 is an apocalyptic number.

It is an amenable number.

846666749 is a deficient number, since it is larger than the sum of its proper divisors (94915).

846666749 is an equidigital number, since it uses as much as digits as its factorization.

846666749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94914.

The product of its digits is 10450944, while the sum is 56.

The square root of 846666749 is about 29097.5385385087. The cubic root of 846666749 is about 946.0283865425.

The spelling of 846666749 in words is "eight hundred forty-six million, six hundred sixty-six thousand, seven hundred forty-nine".