65841749 has 4 divisors (see below), whose sum is σ = 66209760. Its totient is φ = 65473740.

The previous prime is 65841739. The next prime is 65841773. The reversal of 65841749 is 94714856.

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 a cyclic number.

It is not a de Polignac number, because 65841749 - 2⁴ = 65841733 is a prime.

It is a super-2 number, since 2×65841749² = 8670271822758002, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65841739) 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, 183737 + ... + 184094.

It is an arithmetic number, because the mean of its divisors is an integer number (16552440).

Almost surely, 2^65841749 is an apocalyptic number.

It is an amenable number.

65841749 is a deficient number, since it is larger than the sum of its proper divisors (368011).

65841749 is a wasteful number, since it uses less digits than its factorization.

65841749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368010.

The product of its digits is 241920, while the sum is 44.

The square root of 65841749 is about 8114.2928835481. The cubic root of 65841749 is about 403.8007484766.

The spelling of 65841749 in words is "sixty-five million, eight hundred forty-one thousand, seven hundred forty-nine".