65772755 has 16 divisors (see below), whose sum is σ = 82612224. Its totient is φ = 50175840.

The previous prime is 65772743. The next prime is 65772799. The reversal of 65772755 is 55727756.

It is a happy number.

It is not a de Polignac number, because 65772755 - 2⁴ = 65772739 is a prime.

It is a Duffinian number.

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 15 ways as a sum of consecutive naturals, for example, 48902 + ... + 50228.

It is an arithmetic number, because the mean of its divisors is an integer number (5163264).

Almost surely, 2^65772755 is an apocalyptic number.

65772755 is a deficient number, since it is larger than the sum of its proper divisors (16839469).

65772755 is a wasteful number, since it uses less digits than its factorization.

65772755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1786.

The product of its digits is 514500, while the sum is 44.

The square root of 65772755 is about 8110.0403821436. The cubic root of 65772755 is about 403.6596547879.

The spelling of 65772755 in words is "sixty-five million, seven hundred seventy-two thousand, seven hundred fifty-five".