65374751661 has 32 divisors (see below), whose sum is σ = 93096787968. Its totient is φ = 40711059840.

The previous prime is 65374751647. The next prime is 65374751671. The reversal of 65374751661 is 16615747356.

It is not a de Polignac number, because 65374751661 - 2¹⁸ = 65374489517 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65374751641) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1459996 + ... + 1504106.

It is an arithmetic number, because the mean of its divisors is an integer number (2909274624).

Almost surely, 2^65374751661 is an apocalyptic number.

It is an amenable number.

65374751661 is a deficient number, since it is larger than the sum of its proper divisors (27722036307).

65374751661 is a wasteful number, since it uses less digits than its factorization.

65374751661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44641.

The product of its digits is 3175200, while the sum is 51.

The spelling of 65374751661 in words is "sixty-five billion, three hundred seventy-four million, seven hundred fifty-one thousand, six hundred sixty-one".