1660506061 has 2 divisors, whose sum is σ = 1660506062. Its totient is φ = 1660506060.

The previous prime is 1660506037. The next prime is 1660506131. The reversal of 1660506061 is 1606050661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 859955625 + 800550436 = 29325^2 + 28294^2 .

It is an emirp because it is prime and its reverse (1606050661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1660506061 - 2⁷ = 1660505933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1660506031) 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 as a sum of consecutive naturals, namely, 830253030 + 830253031.

It is an arithmetic number, because the mean of its divisors is an integer number (830253031).

Almost surely, 2^1660506061 is an apocalyptic number.

It is an amenable number.

1660506061 is a deficient number, since it is larger than the sum of its proper divisors (1).

1660506061 is an equidigital number, since it uses as much as digits as its factorization.

1660506061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 1660506061 is about 40749.3074910482. The cubic root of 1660506061 is about 1184.1684567216.

The spelling of 1660506061 in words is "one billion, six hundred sixty million, five hundred six thousand, sixty-one".