65782457 has 8 divisors (see below), whose sum is σ = 71320200. Its totient is φ = 60312960.

The previous prime is 65782447. The next prime is 65782471. The reversal of 65782457 is 75428756.

It can be written as a sum of positive squares in 4 ways, for example, as 5812921 + 59969536 = 2411^2 + 7744^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 65782457 - 2⁴ = 65782441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65782447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15044 + ... + 18917.

It is an arithmetic number, because the mean of its divisors is an integer number (8915025).

Almost surely, 2^65782457 is an apocalyptic number.

It is an amenable number.

65782457 is a deficient number, since it is larger than the sum of its proper divisors (5537743).

65782457 is a wasteful number, since it uses less digits than its factorization.

65782457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34123.

The product of its digits is 470400, while the sum is 44.

The square root of 65782457 is about 8110.6385075406. The cubic root of 65782457 is about 403.6795014727.

The spelling of 65782457 in words is "sixty-five million, seven hundred eighty-two thousand, four hundred fifty-seven".