1405290666 has 16 divisors (see below), whose sum is σ = 3026780064. Its totient is φ = 432397104.

The previous prime is 1405290659. The next prime is 1405290721. The reversal of 1405290666 is 6660925041.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9008196 + ... + 9008351.

It is an arithmetic number, because the mean of its divisors is an integer number (189173754).

Almost surely, 2^1405290666 is an apocalyptic number.

1405290666 is an abundant number, since it is smaller than the sum of its proper divisors (1621489398).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1405290666 is a wasteful number, since it uses less digits than its factorization.

1405290666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18016565.

The product of its (nonzero) digits is 77760, while the sum is 39.

The square root of 1405290666 is about 37487.2066977522. The cubic root of 1405290666 is about 1120.0963634137.

The spelling of 1405290666 in words is "one billion, four hundred five million, two hundred ninety thousand, six hundred sixty-six".