1666021401514 has 16 divisors (see below), whose sum is σ = 2552488848000. Its totient is φ = 815195755744.

The previous prime is 1666021401463. The next prime is 1666021401593. The reversal of 1666021401514 is 4151041206661.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144964 + ... + 1831135.

It is an arithmetic number, because the mean of its divisors is an integer number (159530553000).

Almost surely, 2^{1666021401514} is an apocalyptic number.

1666021401514 is a deficient number, since it is larger than the sum of its proper divisors (886467446486).

1666021401514 is a wasteful number, since it uses less digits than its factorization.

1666021401514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1985117.

The product of its (nonzero) digits is 34560, while the sum is 37.

The spelling of 1666021401514 in words is "one trillion, six hundred sixty-six billion, twenty-one million, four hundred one thousand, five hundred fourteen".