1666130340516 has 12 divisors (see below), whose sum is σ = 3887637461232. Its totient is φ = 555376780168.

The previous prime is 1666130340509. The next prime is 1666130340533. The reversal of 1666130340516 is 6150430316661.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×1666130340516² (a number of 25 digits) contains 22 as substring.

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, 69422097510 + ... + 69422097533.

It is an arithmetic number, because the mean of its divisors is an integer number (323969788436).

Almost surely, 2^{1666130340516} is an apocalyptic number.

It is an amenable number.

1666130340516 is an abundant number, since it is smaller than the sum of its proper divisors (2221507120716).

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

1666130340516 is a wasteful number, since it uses less digits than its factorization.

1666130340516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138844195050 (or 138844195048 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 42.

The spelling of 1666130340516 in words is "one trillion, six hundred sixty-six billion, one hundred thirty million, three hundred forty thousand, five hundred sixteen".