65761457 has 4 divisors (see below), whose sum is σ = 69629796. Its totient is φ = 61893120.

The previous prime is 65761453. The next prime is 65761517. The reversal of 65761457 is 75416756.

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

It can be written as a sum of positive squares in 2 ways, for example, as 60078001 + 5683456 = 7751^2 + 2384^2 .

It is a cyclic number.

It is not a de Polignac number, because 65761457 - 2² = 65761453 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65761453) 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, 1934144 + ... + 1934177.

It is an arithmetic number, because the mean of its divisors is an integer number (17407449).

Almost surely, 2^65761457 is an apocalyptic number.

It is an amenable number.

65761457 is a deficient number, since it is larger than the sum of its proper divisors (3868339).

65761457 is a wasteful number, since it uses less digits than its factorization.

65761457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3868338.

The product of its digits is 176400, while the sum is 41.

The square root of 65761457 is about 8109.3438082252. The cubic root of 65761457 is about 403.6365408205.

The spelling of 65761457 in words is "sixty-five million, seven hundred sixty-one thousand, four hundred fifty-seven".