1660572701 has 2 divisors, whose sum is σ = 1660572702. Its totient is φ = 1660572700.

The previous prime is 1660572673. The next prime is 1660572703. The reversal of 1660572701 is 1072750661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1660562500 + 10201 = 40750^2 + 101^2 .

It is an emirp because it is prime and its reverse (1072750661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1660572701 - 2¹⁸ = 1660310557 is a prime.

It is a Sophie Germain prime.

Together with 1660572703, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1660572703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 830286350 + 830286351.

It is an arithmetic number, because the mean of its divisors is an integer number (830286351).

Almost surely, 2^1660572701 is an apocalyptic number.

It is an amenable number.

1660572701 is a deficient number, since it is larger than the sum of its proper divisors (1).

1660572701 is an equidigital number, since it uses as much as digits as its factorization.

1660572701 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17640, while the sum is 35.

The square root of 1660572701 is about 40750.1251654519. The cubic root of 1660572701 is about 1184.1842976615.

The spelling of 1660572701 in words is "one billion, six hundred sixty million, five hundred seventy-two thousand, seven hundred one".