655666516 has 12 divisors (see below), whose sum is σ = 1207806880. Its totient is φ = 310578840.

The previous prime is 655666511. The next prime is 655666559. The reversal of 655666516 is 615666556.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655666511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4313520 + ... + 4313671.

Almost surely, 2^655666516 is an apocalyptic number.

It is an amenable number.

655666516 is a deficient number, since it is larger than the sum of its proper divisors (552140364).

655666516 is a wasteful number, since it uses less digits than its factorization.

655666516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8627214 (or 8627212 counting only the distinct ones).

The product of its digits is 972000, while the sum is 46.

The square root of 655666516 is about 25605.9859407913. The cubic root of 655666516 is about 868.7490348936.

The spelling of 655666516 in words is "six hundred fifty-five million, six hundred sixty-six thousand, five hundred sixteen".