1660666525435 has 8 divisors (see below), whose sum is σ = 1992939068736. Its totient is φ = 1328440394880.

The previous prime is 1660666525433. The next prime is 1660666525439. The reversal of 1660666525435 is 5345256660661.

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

It is not a de Polignac number, because 1660666525435 - 2¹ = 1660666525433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1660666525433) 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, 11524419 + ... + 11667628.

It is an arithmetic number, because the mean of its divisors is an integer number (249117383592).

Almost surely, 2^{1660666525435} is an apocalyptic number.

1660666525435 is a deficient number, since it is larger than the sum of its proper divisors (332272543301).

1660666525435 is a wasteful number, since it uses less digits than its factorization.

1660666525435 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23206373.

The product of its (nonzero) digits is 23328000, while the sum is 55.

The spelling of 1660666525435 in words is "one trillion, six hundred sixty billion, six hundred sixty-six million, five hundred twenty-five thousand, four hundred thirty-five".