1666515093730 has 8 divisors (see below), whose sum is σ = 2999727168732. Its totient is φ = 666606037488.

The previous prime is 1666515093703. The next prime is 1666515093773. The reversal of 1666515093730 is 373905156661.

It can be written as a sum of positive squares in 2 ways, for example, as 1629730538881 + 36784554849 = 1276609^2 + 191793^2 .

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

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, 83325754677 + ... + 83325754696.

Almost surely, 2^{1666515093730} is an apocalyptic number.

1666515093730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1666515093730 is a deficient number, since it is larger than the sum of its proper divisors (1333212075002).

1666515093730 is a wasteful number, since it uses less digits than its factorization.

1666515093730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166651509380.

The product of its (nonzero) digits is 3061800, while the sum is 52.

The spelling of 1666515093730 in words is "one trillion, six hundred sixty-six billion, five hundred fifteen million, ninety-three thousand, seven hundred thirty".