866908497 has 64 divisors (see below), whose sum is σ = 1513809920. Its totient is φ = 428488704.

The previous prime is 866908487. The next prime is 866908517. The reversal of 866908497 is 794809668.

It is not a de Polignac number, because 866908497 - 2⁸ = 866908241 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (866908447) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 502278 + ... + 504000.

It is an arithmetic number, because the mean of its divisors is an integer number (23653280).

Almost surely, 2^866908497 is an apocalyptic number.

It is an amenable number.

866908497 is a deficient number, since it is larger than the sum of its proper divisors (646901423).

866908497 is a wasteful number, since it uses less digits than its factorization.

866908497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1862.

The product of its (nonzero) digits is 5225472, while the sum is 57.

The square root of 866908497 is about 29443.3098852694. The cubic root of 866908497 is about 953.5081728844.

The spelling of 866908497 in words is "eight hundred sixty-six million, nine hundred eight thousand, four hundred ninety-seven".