665683143430461 has 16 divisors (see below), whose sum is σ = 955853305728384. Its totient is φ = 409650913635264.

The previous prime is 665683143430433. The next prime is 665683143430531. The reversal of 665683143430461 is 164034341386566.

It is a happy number.

It is not a de Polignac number, because 665683143430461 - 2⁹ = 665683143429949 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 665683143430395 and 665683143430404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665683143430661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74407395 + ... + 82872351.

It is an arithmetic number, because the mean of its divisors is an integer number (59740831608024).

Almost surely, 2^{665683143430461} is an apocalyptic number.

It is an amenable number.

665683143430461 is a deficient number, since it is larger than the sum of its proper divisors (290170162297923).

665683143430461 is a wasteful number, since it uses less digits than its factorization.

665683143430461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10481380.

The product of its (nonzero) digits is 89579520, while the sum is 60.

The spelling of 665683143430461 in words is "six hundred sixty-five trillion, six hundred eighty-three billion, one hundred forty-three million, four hundred thirty thousand, four hundred sixty-one".