65257653 has 4 divisors (see below), whose sum is σ = 87010208. Its totient is φ = 43505100.

The previous prime is 65257651. The next prime is 65257657. The reversal of 65257653 is 35675256.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 65257653 - 2¹ = 65257651 is a prime.

It is a super-2 number, since 2×65257653² = 8517122550136818, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65257651) 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, 10876273 + ... + 10876278.

It is an arithmetic number, because the mean of its divisors is an integer number (21752552).

Almost surely, 2^65257653 is an apocalyptic number.

It is an amenable number.

65257653 is a deficient number, since it is larger than the sum of its proper divisors (21752555).

65257653 is a wasteful number, since it uses less digits than its factorization.

65257653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21752554.

The product of its digits is 189000, while the sum is 39.

The square root of 65257653 is about 8078.2209056202. The cubic root of 65257653 is about 402.6031329150.

The spelling of 65257653 in words is "sixty-five million, two hundred fifty-seven thousand, six hundred fifty-three".