1406533666 has 8 divisors (see below), whose sum is σ = 2110708764. Its totient is φ = 702964080.

The previous prime is 1406533657. The next prime is 1406533673. The reversal of 1406533666 is 6663356041.

It can be written as a sum of positive squares in 2 ways, for example, as 1382278041 + 24255625 = 37179^2 + 4925^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145525 + ... + 154888.

Almost surely, 2^1406533666 is an apocalyptic number.

1406533666 is a deficient number, since it is larger than the sum of its proper divisors (704175098).

1406533666 is a wasteful number, since it uses less digits than its factorization.

1406533666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302756.

The product of its (nonzero) digits is 233280, while the sum is 40.

The square root of 1406533666 is about 37503.7820226174. The cubic root of 1406533666 is about 1120.4265132581.

The spelling of 1406533666 in words is "one billion, four hundred six million, five hundred thirty-three thousand, six hundred sixty-six".