655665201 has 12 divisors (see below), whose sum is σ = 950101828. Its totient is φ = 435711744.

The previous prime is 655665169. The next prime is 655665203. The reversal of 655665201 is 102566556.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 66341025 + 589324176 = 8145^2 + 24276^2 .

It is not a de Polignac number, because 655665201 - 2⁵ = 655665169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (655665203) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 113560 + ... + 119193.

Almost surely, 2^655665201 is an apocalyptic number.

It is an amenable number.

655665201 is a deficient number, since it is larger than the sum of its proper divisors (294436627).

655665201 is a wasteful number, since it uses less digits than its factorization.

655665201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233072 (or 233069 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The square root of 655665201 is about 25605.9602631887. The cubic root of 655665201 is about 868.7484541076.

It can be divided in two parts, 655 and 665201, that added together give a square (665856 = 816²).

The spelling of 655665201 in words is "six hundred fifty-five million, six hundred sixty-five thousand, two hundred one".