1667601013 has 8 divisors (see below), whose sum is σ = 1796209688. Its totient is φ = 1539039744.

The previous prime is 1667600999. The next prime is 1667601037. The reversal of 1667601013 is 3101067661.

It can be written as a sum of positive squares in 4 ways, for example, as 238609809 + 1428991204 = 15447^2 + 37802^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1667601013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1667601113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101245 + ... + 116557.

It is an arithmetic number, because the mean of its divisors is an integer number (224526211).

Almost surely, 2^1667601013 is an apocalyptic number.

1667601013 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1667601013 is a deficient number, since it is larger than the sum of its proper divisors (128608675).

1667601013 is a wasteful number, since it uses less digits than its factorization.

1667601013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23703.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 1667601013 is about 40836.2708018252. The cubic root of 1667601013 is about 1185.8526181217.

Adding to 1667601013 its reverse (3101067661), we get a palindrome (4768668674).

The spelling of 1667601013 in words is "one billion, six hundred sixty-seven million, six hundred one thousand, thirteen".