65842491 has 32 divisors (see below), whose sum is σ = 107638272. Its totient is φ = 35228160.

The previous prime is 65842487. The next prime is 65842507. The reversal of 65842491 is 19424856.

It is not a de Polignac number, because 65842491 - 2² = 65842487 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (65842421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6531 + ... + 13203.

It is an arithmetic number, because the mean of its divisors is an integer number (3363696).

Almost surely, 2^65842491 is an apocalyptic number.

65842491 is a deficient number, since it is larger than the sum of its proper divisors (41795781).

65842491 is a wasteful number, since it uses less digits than its factorization.

65842491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6723.

The product of its digits is 69120, while the sum is 39.

The square root of 65842491 is about 8114.3386052099. The cubic root of 65842491 is about 403.8022653411.

The spelling of 65842491 in words is "sixty-five million, eight hundred forty-two thousand, four hundred ninety-one".