55620065 has 8 divisors (see below), whose sum is σ = 68548200. Its totient is φ = 43293312.

The previous prime is 55620053. The next prime is 55620079. The reversal of 55620065 is 56002655.

It can be written as a sum of positive squares in 4 ways, for example, as 12271009 + 43349056 = 3503^2 + 6584^2 .

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 55620065 - 2¹⁰ = 55619041 is a prime.

It is a Curzon 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, 150140 + ... + 150509.

It is an arithmetic number, because the mean of its divisors is an integer number (8568525).

Almost surely, 2^55620065 is an apocalyptic number.

It is an amenable number.

55620065 is a deficient number, since it is larger than the sum of its proper divisors (12928135).

55620065 is a wasteful number, since it uses less digits than its factorization.

55620065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300691.

The product of its (nonzero) digits is 9000, while the sum is 29.

The square root of 55620065 is about 7457.8860945981. The cubic root of 55620065 is about 381.7190468167.

The spelling of 55620065 in words is "fifty-five million, six hundred twenty thousand, sixty-five".