1660471745 has 8 divisors (see below), whose sum is σ = 1993268520. Its totient is φ = 1327909120.

The previous prime is 1660471741. The next prime is 1660471783. The reversal of 1660471745 is 5471740661.

It can be written as a sum of positive squares in 4 ways, for example, as 837986704 + 822485041 = 28948^2 + 28679^2 .

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

It is not a de Polignac number, because 1660471745 - 2² = 1660471741 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1660471741) 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, 42536 + ... + 71625.

It is an arithmetic number, because the mean of its divisors is an integer number (249158565).

Almost surely, 2^1660471745 is an apocalyptic number.

It is an amenable number.

1660471745 is a deficient number, since it is larger than the sum of its proper divisors (332796775).

1660471745 is a wasteful number, since it uses less digits than its factorization.

1660471745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117075.

The product of its (nonzero) digits is 141120, while the sum is 41.

The square root of 1660471745 is about 40748.8864265025. The cubic root of 1660471745 is about 1184.1602993280.

The spelling of 1660471745 in words is "one billion, six hundred sixty million, four hundred seventy-one thousand, seven hundred forty-five".