1605600606666 has 32 divisors (see below), whose sum is σ = 3684565559808. Its totient is φ = 456915366000.

The previous prime is 1605600606661. The next prime is 1605600606677. The reversal of 1605600606666 is 6666060065061.

It is not an unprimeable number, because it can be changed into a prime (1605600606661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76142020 + ... + 76163103.

It is an arithmetic number, because the mean of its divisors is an integer number (115142673744).

Almost surely, 2^{1605600606666} is an apocalyptic number.

1605600606666 is an abundant number, since it is smaller than the sum of its proper divisors (2078964953142).

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

1605600606666 is a wasteful number, since it uses less digits than its factorization.

1605600606666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152305386.

The product of its (nonzero) digits is 1399680, while the sum is 48.

The spelling of 1605600606666 in words is "one trillion, six hundred five billion, six hundred million, six hundred six thousand, six hundred sixty-six".