1600660061 has 32 divisors (see below), whose sum is σ = 2156077056. Its totient is φ = 1147608000.

The previous prime is 1600660051. The next prime is 1600660081.

1600660061 is nontrivially palindromic in base 10.

It is a de Polignac number, because none of the positive numbers 2^k-1600660061 is a prime.

It is a super-2 number, since 2×1600660061² = 5124225261761047442, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1600660061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1600660031) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 328916 + ... + 333746.

It is an arithmetic number, because the mean of its divisors is an integer number (67377408).

Almost surely, 2^1600660061 is an apocalyptic number.

1600660061 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1600660061 is a deficient number, since it is larger than the sum of its proper divisors (555416995).

1600660061 is a wasteful number, since it uses less digits than its factorization.

1600660061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5193.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 1600660061 is about 40008.2499117370. The cubic root of 1600660061 is about 1169.7679090126.

It can be divided in two parts, 16006 and 60061, that added together give a palindrome (76067).

The spelling of 1600660061 in words is "one billion, six hundred million, six hundred sixty thousand, sixty-one".