1000660361 has 4 divisors (see below), whose sum is σ = 1002919632. Its totient is φ = 998401092.

The previous prime is 1000660337. The next prime is 1000660369. The reversal of 1000660361 is 1630660001.

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.

It is a cyclic number.

It is not a de Polignac number, because 1000660361 - 2²² = 996466057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1000660369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1128971 + ... + 1129856.

It is an arithmetic number, because the mean of its divisors is an integer number (250729908).

Almost surely, 2^1000660361 is an apocalyptic number.

It is an amenable number.

1000660361 is a deficient number, since it is larger than the sum of its proper divisors (2259271).

1000660361 is an equidigital number, since it uses as much as digits as its factorization.

1000660361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2259270.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 1000660361 is about 31633.2161026981. The cubic root of 1000660361 is about 1000.2200718981.

The spelling of 1000660361 in words is "one billion, six hundred sixty thousand, three hundred sixty-one".