1660523453 has 2 divisors, whose sum is σ = 1660523454. Its totient is φ = 1660523452.

The previous prime is 1660523437. The next prime is 1660523507. The reversal of 1660523453 is 3543250661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1582607524 + 77915929 = 39782^2 + 8827^2 .

It is a cyclic number.

It is not a de Polignac number, because 1660523453 - 2⁴ = 1660523437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1660520453) 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, 830261726 + 830261727.

It is an arithmetic number, because the mean of its divisors is an integer number (830261727).

Almost surely, 2^1660523453 is an apocalyptic number.

It is an amenable number.

1660523453 is a deficient number, since it is larger than the sum of its proper divisors (1).

1660523453 is an equidigital number, since it uses as much as digits as its factorization.

1660523453 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64800, while the sum is 35.

The square root of 1660523453 is about 40749.5208928890. The cubic root of 1660523453 is about 1184.1725910006.

The spelling of 1660523453 in words is "one billion, six hundred sixty million, five hundred twenty-three thousand, four hundred fifty-three".