866763747 has 48 divisors (see below), whose sum is σ = 1327639040. Its totient is φ = 564980832.

The previous prime is 866763743. The next prime is 866763757. The reversal of 866763747 is 747367668.

It is not a de Polignac number, because 866763747 - 2² = 866763743 is a prime.

It is a super-2 number, since 2×866763747² = 1502558786226960018, 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 = 866763693 and 866763702.

It is not an unprimeable number, because it can be changed into a prime (866763743) 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 47 ways as a sum of consecutive naturals, for example, 3128973 + ... + 3129249.

Almost surely, 2^866763747 is an apocalyptic number.

866763747 is a deficient number, since it is larger than the sum of its proper divisors (460875293).

866763747 is a wasteful number, since it uses less digits than its factorization.

866763747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 534 (or 522 counting only the distinct ones).

The product of its digits is 7112448, while the sum is 54.

The square root of 866763747 is about 29440.8516690669. The cubic root of 866763747 is about 953.4551000049.

The spelling of 866763747 in words is "eight hundred sixty-six million, seven hundred sixty-three thousand, seven hundred forty-seven".