65557755 has 48 divisors (see below), whose sum is σ = 119508480. Its totient is φ = 34471008.

The previous prime is 65557753. The next prime is 65557759. The reversal of 65557755 is 55775556.

It is not a de Polignac number, because 65557755 - 2¹ = 65557753 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 65557755.

It is not an unprimeable number, because it can be changed into a prime (65557753) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 95644 + ... + 96326.

It is an arithmetic number, because the mean of its divisors is an integer number (2489760).

Almost surely, 2^65557755 is an apocalyptic number.

65557755 is a deficient number, since it is larger than the sum of its proper divisors (53950725).

65557755 is an equidigital number, since it uses as much as digits as its factorization.

65557755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 782 (or 770 counting only the distinct ones).

The product of its digits is 918750, while the sum is 45.

The square root of 65557755 is about 8096.7743577304. The cubic root of 65557755 is about 403.2193429815.

The spelling of 65557755 in words is "sixty-five million, five hundred fifty-seven thousand, seven hundred fifty-five".