866337961 has 4 divisors (see below), whose sum is σ = 866775952. Its totient is φ = 865899972.

The previous prime is 866337929. The next prime is 866337971. The reversal of 866337961 is 169733668.

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 866337961 - 2⁵ = 866337929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (866337971) 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, 216015 + ... + 219988.

It is an arithmetic number, because the mean of its divisors is an integer number (216693988).

Almost surely, 2^866337961 is an apocalyptic number.

It is an amenable number.

866337961 is a deficient number, since it is larger than the sum of its proper divisors (437991).

866337961 is a wasteful number, since it uses less digits than its factorization.

866337961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437990.

The product of its digits is 979776, while the sum is 49.

The square root of 866337961 is about 29433.6195701446. The cubic root of 866337961 is about 953.2989504474.

The spelling of 866337961 in words is "eight hundred sixty-six million, three hundred thirty-seven thousand, nine hundred sixty-one".