65780377 has 16 divisors (see below), whose sum is σ = 72352000. Its totient is φ = 59793552.

The previous prime is 65780369. The next prime is 65780389. The reversal of 65780377 is 77308756.

It is not a de Polignac number, because 65780377 - 2³ = 65780369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65780347) by changing a digit.

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, 173374 + ... + 173752.

It is an arithmetic number, because the mean of its divisors is an integer number (4522000).

Almost surely, 2^65780377 is an apocalyptic number.

It is an amenable number.

65780377 is a deficient number, since it is larger than the sum of its proper divisors (6571623).

65780377 is an equidigital number, since it uses as much as digits as its factorization.

65780377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497 (or 471 counting only the distinct ones).

The product of its (nonzero) digits is 246960, while the sum is 43.

The square root of 65780377 is about 8110.5102798776. The cubic root of 65780377 is about 403.6752467304.

The spelling of 65780377 in words is "sixty-five million, seven hundred eighty thousand, three hundred seventy-seven".