1660660420607 has 8 divisors (see below), whose sum is σ = 1664853676512. Its totient is φ = 1656467424000.

The previous prime is 1660660420571. The next prime is 1660660420687. The reversal of 1660660420607 is 7060240660661.

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 1660660420607 - 2¹² = 1660660416511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1660660420687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23507843 + ... + 23578379.

It is an arithmetic number, because the mean of its divisors is an integer number (208106709564).

Almost surely, 2^{1660660420607} is an apocalyptic number.

1660660420607 is a deficient number, since it is larger than the sum of its proper divisors (4193255905).

1660660420607 is an equidigital number, since it uses as much as digits as its factorization.

1660660420607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129649.

The product of its (nonzero) digits is 435456, while the sum is 44.

The spelling of 1660660420607 in words is "one trillion, six hundred sixty billion, six hundred sixty million, four hundred twenty thousand, six hundred seven".