1660051613 has 4 divisors (see below), whose sum is σ = 1810965408. Its totient is φ = 1509137820.

The previous prime is 1660051577. The next prime is 1660051633. The reversal of 1660051613 is 3161500661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3161500661 = 11 ⋅287409151.

It is a cyclic number.

It is not a de Polignac number, because 1660051613 - 2⁸ = 1660051357 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 (1660051633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75456881 + ... + 75456902.

It is an arithmetic number, because the mean of its divisors is an integer number (452741352).

Almost surely, 2^1660051613 is an apocalyptic number.

It is an amenable number.

1660051613 is a deficient number, since it is larger than the sum of its proper divisors (150913795).

1660051613 is a wasteful number, since it uses less digits than its factorization.

1660051613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150913794.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 1660051613 is about 40743.7309656345. The cubic root of 1660051613 is about 1184.0604189573.

The spelling of 1660051613 in words is "one billion, six hundred sixty million, fifty-one thousand, six hundred thirteen".