966571649 has 4 divisors (see below), whose sum is σ = 967593264. Its totient is φ = 965550036.

The previous prime is 966571643. The next prime is 966571663. The reversal of 966571649 is 946175669.

966571649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 966571649 - 2²⁰ = 965523073 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 966571649.

It is not an unprimeable number, because it can be changed into a prime (966571643) 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, 509387 + ... + 511280.

It is an arithmetic number, because the mean of its divisors is an integer number (241898316).

Almost surely, 2^966571649 is an apocalyptic number.

It is an amenable number.

966571649 is a deficient number, since it is larger than the sum of its proper divisors (1021615).

966571649 is a wasteful number, since it uses less digits than its factorization.

966571649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1021614.

The product of its digits is 2449440, while the sum is 53.

The square root of 966571649 is about 31089.7354282728. The cubic root of 966571649 is about 988.7306961815.

The spelling of 966571649 in words is "nine hundred sixty-six million, five hundred seventy-one thousand, six hundred forty-nine".