6665655510 has 64 divisors (see below), whose sum is σ = 18388036800. Its totient is φ = 1716212736.

The previous prime is 6665655497. The next prime is 6665655517. The reversal of 6665655510 is 155565666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6665655517) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 417819 + ... + 433478.

It is an arithmetic number, because the mean of its divisors is an integer number (287313075).

Almost surely, 2^6665655510 is an apocalyptic number.

6665655510 is an abundant number, since it is smaller than the sum of its proper divisors (11722381290).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6665655510 is a wasteful number, since it uses less digits than its factorization.

6665655510 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 851342 (or 851336 counting only the distinct ones).

The product of its (nonzero) digits is 810000, while the sum is 45.

The square root of 6665655510 is about 81643.4658132542. The cubic root of 6665655510 is about 1881.9768994655.

The spelling of 6665655510 in words is "six billion, six hundred sixty-five million, six hundred fifty-five thousand, five hundred ten".