660746461 has 8 divisors (see below), whose sum is σ = 691041600. Its totient is φ = 630581952.

The previous prime is 660746423. The next prime is 660746467. The reversal of 660746461 is 164647066.

It is a happy number.

660746461 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 660746461 - 2¹⁵ = 660713693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660746467) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22236 + ... + 42613.

It is an arithmetic number, because the mean of its divisors is an integer number (86380200).

Almost surely, 2^660746461 is an apocalyptic number.

It is an amenable number.

660746461 is a deficient number, since it is larger than the sum of its proper divisors (30295139).

660746461 is a wasteful number, since it uses less digits than its factorization.

660746461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65315.

The product of its (nonzero) digits is 145152, while the sum is 40.

The square root of 660746461 is about 25704.9890293694. The cubic root of 660746461 is about 870.9868842445.

The spelling of 660746461 in words is "six hundred sixty million, seven hundred forty-six thousand, four hundred sixty-one".