1610661566679 has 16 divisors (see below), whose sum is σ = 2363513036544. Its totient is φ = 967519952000.

The previous prime is 1610661566677. The next prime is 1610661566741. The reversal of 1610661566679 is 9766651660161.

It is a cyclic number.

It is not a de Polignac number, because 1610661566679 - 2¹ = 1610661566677 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1610661566677) 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, 215960547 + ... + 215968004.

It is an arithmetic number, because the mean of its divisors is an integer number (147719564784).

Almost surely, 2^{1610661566679} is an apocalyptic number.

1610661566679 is a deficient number, since it is larger than the sum of its proper divisors (752851469865).

1610661566679 is a wasteful number, since it uses less digits than its factorization.

1610661566679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431928678.

The product of its (nonzero) digits is 14696640, while the sum is 60.

The spelling of 1610661566679 in words is "one trillion, six hundred ten billion, six hundred sixty-one million, five hundred sixty-six thousand, six hundred seventy-nine".