866680654 has 8 divisors (see below), whose sum is σ = 1485738288. Its totient is φ = 371434560.

The previous prime is 866680603. The next prime is 866680667. The reversal of 866680654 is 456086668.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×866680654² = 1502270712035735432, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 866680598 and 866680607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30952867 + ... + 30952894.

It is an arithmetic number, because the mean of its divisors is an integer number (185717286).

Almost surely, 2^866680654 is an apocalyptic number.

866680654 is a deficient number, since it is larger than the sum of its proper divisors (619057634).

866680654 is a wasteful number, since it uses less digits than its factorization.

866680654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61905770.

The product of its (nonzero) digits is 1658880, while the sum is 49.

The square root of 866680654 is about 29439.4404498455. The cubic root of 866680654 is about 953.4246311193.

The spelling of 866680654 in words is "eight hundred sixty-six million, six hundred eighty thousand, six hundred fifty-four".