660246461 has 4 divisors (see below), whose sum is σ = 754567392. Its totient is φ = 565925532.

The previous prime is 660246449. The next prime is 660246481. The reversal of 660246461 is 164642066.

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, and also an emirpimes, since its reverse is a distinct semiprime: 164642066 = 2 ⋅82321033.

It is a cyclic number.

It is not a de Polignac number, because 660246461 - 2¹⁰ = 660245437 is a prime.

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 (660246421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47160455 + ... + 47160468.

It is an arithmetic number, because the mean of its divisors is an integer number (188641848).

Almost surely, 2^660246461 is an apocalyptic number.

It is an amenable number.

660246461 is a deficient number, since it is larger than the sum of its proper divisors (94320931).

660246461 is an equidigital number, since it uses as much as digits as its factorization.

660246461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94320930.

The product of its (nonzero) digits is 41472, while the sum is 35.

The square root of 660246461 is about 25695.2614503141. The cubic root of 660246461 is about 870.7671311002.

The spelling of 660246461 in words is "six hundred sixty million, two hundred forty-six thousand, four hundred sixty-one".