655868650 has 12 divisors (see below), whose sum is σ = 1219915782. Its totient is φ = 262347440.

The previous prime is 655868641. The next prime is 655868659. The reversal of 655868650 is 56868556.

It is an interprime number because it is at equal distance from previous prime (655868641) and next prime (655868659).

It can be written as a sum of positive squares in 3 ways, for example, as 586463089 + 69405561 = 24217^2 + 8331^2 .

It is a junction number, because it is equal to n+sod(n) for n = 655868594 and 655868603.

It is not an unprimeable number, because it can be changed into a prime (655868659) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6558637 + ... + 6558736.

Almost surely, 2^655868650 is an apocalyptic number.

655868650 is a deficient number, since it is larger than the sum of its proper divisors (564047132).

655868650 is a wasteful number, since it uses less digits than its factorization.

655868650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13117385 (or 13117380 counting only the distinct ones).

The product of its (nonzero) digits is 1728000, while the sum is 49.

The square root of 655868650 is about 25609.9326434101. The cubic root of 655868650 is about 868.8383006360.

The spelling of 655868650 in words is "six hundred fifty-five million, eight hundred sixty-eight thousand, six hundred fifty".