866997481 has 4 divisors (see below), whose sum is σ = 990854272. Its totient is φ = 743140692.

The previous prime is 866997473. The next prime is 866997511. The reversal of 866997481 is 184799668.

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 not a de Polignac number, because 866997481 - 2³ = 866997473 is a prime.

It is a super-2 number, since 2×866997481² = 1503369264120690722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (866937481) 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 3 ways as a sum of consecutive naturals, for example, 61928385 + ... + 61928398.

It is an arithmetic number, because the mean of its divisors is an integer number (247713568).

Almost surely, 2^866997481 is an apocalyptic number.

It is an amenable number.

866997481 is a deficient number, since it is larger than the sum of its proper divisors (123856791).

866997481 is a wasteful number, since it uses less digits than its factorization.

866997481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123856790.

The product of its digits is 5225472, while the sum is 58.

The square root of 866997481 is about 29444.8209537773. The cubic root of 866997481 is about 953.5407961154.

The spelling of 866997481 in words is "eight hundred sixty-six million, nine hundred ninety-seven thousand, four hundred eighty-one".