65755755 has 24 divisors (see below), whose sum is σ = 122745168. Its totient is φ = 32371776.

The previous prime is 65755721. The next prime is 65755793. The reversal of 65755755 is 55755756.

65755755 is a `hidden beast` number, since 6 + 5 + 75 + 575 + 5 = 666.

It is not a de Polignac number, because 65755755 - 2⁶ = 65755691 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 65755755.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 55617 + ... + 56786.

It is an arithmetic number, because the mean of its divisors is an integer number (5114382).

Almost surely, 2^65755755 is an apocalyptic number.

65755755 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

65755755 is a deficient number, since it is larger than the sum of its proper divisors (56989413).

65755755 is a wasteful number, since it uses less digits than its factorization.

65755755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112427 (or 112424 counting only the distinct ones).

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

The square root of 65755755 is about 8108.9922308509. The cubic root of 65755755 is about 403.6248744018.

Subtracting from 65755755 its reverse (55755756), we obtain a palindrome (9999999).

The spelling of 65755755 in words is "sixty-five million, seven hundred fifty-five thousand, seven hundred fifty-five".