55665205 has 8 divisors (see below), whose sum is σ = 68603832. Its totient is φ = 43328448.

The previous prime is 55665187. The next prime is 55665223. The reversal of 55665205 is 50256655.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (55665187) and next prime (55665223).

It can be written as a sum of positive squares in 4 ways, for example, as 25623844 + 30041361 = 5062^2 + 5481^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55665205 - 2²³ = 47276597 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 150262 + ... + 150631.

It is an arithmetic number, because the mean of its divisors is an integer number (8575479).

Almost surely, 2^55665205 is an apocalyptic number.

It is an amenable number.

55665205 is a deficient number, since it is larger than the sum of its proper divisors (12938627).

55665205 is a wasteful number, since it uses less digits than its factorization.

55665205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300935.

The product of its (nonzero) digits is 45000, while the sum is 34.

The square root of 55665205 is about 7460.9118075474. The cubic root of 55665205 is about 381.8222837720.

The spelling of 55665205 in words is "fifty-five million, six hundred sixty-five thousand, two hundred five".