1660501061 has 4 divisors (see below), whose sum is σ = 1758177612. Its totient is φ = 1562824512.

The previous prime is 1660501001. The next prime is 1660501091. The reversal of 1660501061 is 1601050661.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 463756225 + 1196744836 = 21535^2 + 34594^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1660501061 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1660501061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1660501001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48838250 + ... + 48838283.

It is an arithmetic number, because the mean of its divisors is an integer number (439544403).

Almost surely, 2^1660501061 is an apocalyptic number.

It is an amenable number.

1660501061 is a deficient number, since it is larger than the sum of its proper divisors (97676551).

1660501061 is an equidigital number, since it uses as much as digits as its factorization.

1660501061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97676550.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 1660501061 is about 40749.2461402662. The cubic root of 1660501061 is about 1184.1672681586.

The spelling of 1660501061 in words is "one billion, six hundred sixty million, five hundred one thousand, sixty-one".