968665655 has 4 divisors (see below), whose sum is σ = 1162398792. Its totient is φ = 774932520.

The previous prime is 968665651. The next prime is 968665673. The reversal of 968665655 is 556566869.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 968665655 - 2² = 968665651 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 968665655.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (968665651) 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, 96866561 + ... + 96866570.

It is an arithmetic number, because the mean of its divisors is an integer number (290599698).

Almost surely, 2^968665655 is an apocalyptic number.

968665655 is a deficient number, since it is larger than the sum of its proper divisors (193733137).

968665655 is a wasteful number, since it uses less digits than its factorization.

968665655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193733136.

The product of its digits is 11664000, while the sum is 56.

The square root of 968665655 is about 31123.3940147922. The cubic root of 968665655 is about 989.4441851679. Note that the first 3 decimals are identical.

The spelling of 968665655 in words is "nine hundred sixty-eight million, six hundred sixty-five thousand, six hundred fifty-five".