655537028866 has 16 divisors (see below), whose sum is σ = 1052845332120. Its totient is φ = 305021854720.

The previous prime is 655537028813. The next prime is 655537028879. The reversal of 655537028866 is 668820735556.

It can be written as a sum of positive squares in 4 ways, for example, as 488211035841 + 167325993025 = 698721^2 + 409055^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108314395 + ... + 108320446.

Almost surely, 2^655537028866 is an apocalyptic number.

655537028866 is a deficient number, since it is larger than the sum of its proper divisors (397308303254).

655537028866 is a wasteful number, since it uses less digits than its factorization.

655537028866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216634949.

The product of its (nonzero) digits is 72576000, while the sum is 61.

The spelling of 655537028866 in words is "six hundred fifty-five billion, five hundred thirty-seven million, twenty-eight thousand, eight hundred sixty-six".