1662143475 has 36 divisors (see below), whose sum is σ = 2782450136. Its totient is φ = 875523840.

The previous prime is 1662143473. The next prime is 1662143519. The reversal of 1662143475 is 5743412661.

It is a happy number.

It is not a de Polignac number, because 1662143475 - 2¹ = 1662143473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1662143471) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 515067 + ... + 518283.

Almost surely, 2^1662143475 is an apocalyptic number.

1662143475 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1662143475 is a deficient number, since it is larger than the sum of its proper divisors (1120306661).

1662143475 is an equidigital number, since it uses as much as digits as its factorization.

1662143475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3396 (or 3308 counting only the distinct ones).

The product of its digits is 120960, while the sum is 39.

The square root of 1662143475 is about 40769.3938512703. The cubic root of 1662143475 is about 1184.5575624020.

The spelling of 1662143475 in words is "one billion, six hundred sixty-two million, one hundred forty-three thousand, four hundred seventy-five".