1660505933 has 2 divisors, whose sum is σ = 1660505934. Its totient is φ = 1660505932.

The previous prime is 1660505927. The next prime is 1660505941. The reversal of 1660505933 is 3395050661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1657955524 + 2550409 = 40718^2 + 1597^2 .

It is an emirp because it is prime and its reverse (3395050661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1660505933 - 2¹² = 1660501837 is a prime.

It is a Sophie Germain 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 (1660505963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 830252966 + 830252967.

It is an arithmetic number, because the mean of its divisors is an integer number (830252967).

Almost surely, 2^1660505933 is an apocalyptic number.

It is an amenable number.

1660505933 is a deficient number, since it is larger than the sum of its proper divisors (1).

1660505933 is an equidigital number, since it uses as much as digits as its factorization.

1660505933 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72900, while the sum is 38.

The square root of 1660505933 is about 40749.3059204694. The cubic root of 1660505933 is about 1184.1684262944.

The spelling of 1660505933 in words is "one billion, six hundred sixty million, five hundred five thousand, nine hundred thirty-three".