65057779 has 4 divisors (see below), whose sum is σ = 65267280. Its totient is φ = 64848280.

The previous prime is 65057771. The next prime is 65057789. The reversal of 65057779 is 97775056.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 65057779 - 2³ = 65057771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65057771) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104284 + ... + 104905.

It is an arithmetic number, because the mean of its divisors is an integer number (16316820).

Almost surely, 2^65057779 is an apocalyptic number.

65057779 is a deficient number, since it is larger than the sum of its proper divisors (209501).

65057779 is a wasteful number, since it uses less digits than its factorization.

65057779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209500.

The product of its (nonzero) digits is 463050, while the sum is 46.

The square root of 65057779 is about 8065.8402538111. The cubic root of 65057779 is about 402.1916757115.

The spelling of 65057779 in words is "sixty-five million, fifty-seven thousand, seven hundred seventy-nine".