660060731 has 8 divisors (see below), whose sum is σ = 722527344. Its totient is φ = 598004320.

The previous prime is 660060701. The next prime is 660060743. The reversal of 660060731 is 137060066.

It is a happy number.

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 660060731 - 2¹⁴ = 660044347 is a prime.

It is a super-2 number, since 2×660060731² = 871360337216508722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 660060694 and 660060703.

It is not an unprimeable number, because it can be changed into a prime (660060701) 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 7 ways as a sum of consecutive naturals, for example, 99176 + ... + 105621.

It is an arithmetic number, because the mean of its divisors is an integer number (90315918).

Almost surely, 2^660060731 is an apocalyptic number.

660060731 is a deficient number, since it is larger than the sum of its proper divisors (62466613).

660060731 is a wasteful number, since it uses less digits than its factorization.

660060731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205101.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 660060731 is about 25691.6471056256. The cubic root of 660060731 is about 870.6854733375.

The spelling of 660060731 in words is "six hundred sixty million, sixty thousand, seven hundred thirty-one".