1660615161607 has 4 divisors (see below), whose sum is σ = 1695947399136. Its totient is φ = 1625282924080.

The previous prime is 1660615161559. The next prime is 1660615161629. The reversal of 1660615161607 is 7061615160661.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1660615161607 - 2¹⁵ = 1660615128839 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 (1660615861607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17666118694 + ... + 17666118787.

It is an arithmetic number, because the mean of its divisors is an integer number (423986849784).

Almost surely, 2^{1660615161607} is an apocalyptic number.

1660615161607 is a deficient number, since it is larger than the sum of its proper divisors (35332237529).

1660615161607 is an equidigital number, since it uses as much as digits as its factorization.

1660615161607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35332237528.

The product of its (nonzero) digits is 272160, while the sum is 46.

The spelling of 1660615161607 in words is "one trillion, six hundred sixty billion, six hundred fifteen million, one hundred sixty-one thousand, six hundred seven".