1662353666 has 8 divisors (see below), whose sum is σ = 2502041724. Its totient is φ = 828339760.

The previous prime is 1662353657. The next prime is 1662353701. The reversal of 1662353666 is 6663532661.

It can be written as a sum of positive squares in 2 ways, for example, as 1547242225 + 115111441 = 39335^2 + 10729^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1417805 + ... + 1418976.

Almost surely, 2^1662353666 is an apocalyptic number.

1662353666 is a deficient number, since it is larger than the sum of its proper divisors (839688058).

1662353666 is a wasteful number, since it uses less digits than its factorization.

1662353666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2837076.

The product of its digits is 699840, while the sum is 44.

The square root of 1662353666 is about 40771.9715736191. The cubic root of 1662353666 is about 1184.6074924768.

The spelling of 1662353666 in words is "one billion, six hundred sixty-two million, three hundred fifty-three thousand, six hundred sixty-six".