1666055000651 has 8 divisors (see below), whose sum is σ = 1679862073824. Its totient is φ = 1652301967680.

The previous prime is 1666055000629. The next prime is 1666055000657. The reversal of 1666055000651 is 1560005506661.

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

It is a cyclic number.

It is not a de Polignac number, because 1666055000651 - 2¹⁰ = 1666054999627 is a prime.

It is a super-2 number, since 2×1666055000651² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1666055000599 and 1666055000608.

It is not an unprimeable number, because it can be changed into a prime (1666055000657) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13448135 + ... + 13571456.

It is an arithmetic number, because the mean of its divisors is an integer number (209982759228).

Almost surely, 2^{1666055000651} is an apocalyptic number.

1666055000651 is a deficient number, since it is larger than the sum of its proper divisors (13807073173).

1666055000651 is a wasteful number, since it uses less digits than its factorization.

1666055000651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27020101.

The product of its (nonzero) digits is 162000, while the sum is 41.

The spelling of 1666055000651 in words is "one trillion, six hundred sixty-six billion, fifty-five million, six hundred fifty-one", and thus it is an aban number.