1662658092481 has 27 divisors (see below), whose sum is σ = 1722151281123. Its totient is φ = 1605199312080.

The previous prime is 1662658092479. The next prime is 1662658092497. The reversal of 1662658092481 is 1842908562661.

It is a happy number.

The square root of 1662658092481 is 1289441.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 487350591025 + 1175307501456 = 698105^2 + 1084116^2 .

It is not a de Polignac number, because 1662658092481 - 2¹ = 1662658092479 is a prime.

It is a super-2 number, since 2×1662658092481² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1662658096481) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 8705016096 + ... + 8705016286.

Almost surely, 2^{1662658092481} is an apocalyptic number.

1662658092481 is the 1289441-st square number.

1662658092481 is the 644721-st centered octagonal number.

It is an amenable number.

1662658092481 is a deficient number, since it is larger than the sum of its proper divisors (59493188642).

1662658092481 is an frugal number, since it uses more digits than its factorization.

1662658092481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 782 (or 391 counting only the distinct ones).

The product of its (nonzero) digits is 9953280, while the sum is 58.

The spelling of 1662658092481 in words is "one trillion, six hundred sixty-two billion, six hundred fifty-eight million, ninety-two thousand, four hundred eighty-one".