866680451 has 16 divisors (see below), whose sum is σ = 1129431744. Its totient is φ = 645387264.

The previous prime is 866680391. The next prime is 866680453. The reversal of 866680451 is 154086668.

It is a cyclic number.

It is not a de Polignac number, because 866680451 - 2⁶ = 866680387 is a prime.

It is a super-2 number, since 2×866680451² = 1502270008291126802, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (866680453) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 278570 + ... + 281663.

It is an arithmetic number, because the mean of its divisors is an integer number (70589484).

Almost surely, 2^866680451 is an apocalyptic number.

866680451 is a deficient number, since it is larger than the sum of its proper divisors (262751293).

866680451 is a wasteful number, since it uses less digits than its factorization.

866680451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560270.

The product of its (nonzero) digits is 276480, while the sum is 44.

The square root of 866680451 is about 29439.4370020896. The cubic root of 866680451 is about 953.4245566800.

The spelling of 866680451 in words is "eight hundred sixty-six million, six hundred eighty thousand, four hundred fifty-one".