1664041126 has 24 divisors (see below), whose sum is σ = 2832121152. Its totient is φ = 731979600.

The previous prime is 1664041123. The next prime is 1664041139. The reversal of 1664041126 is 6211404661.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1664041121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 103405 + ... + 118408.

It is an arithmetic number, because the mean of its divisors is an integer number (118005048).

Almost surely, 2^1664041126 is an apocalyptic number.

1664041126 is a deficient number, since it is larger than the sum of its proper divisors (1168080026).

1664041126 is a wasteful number, since it uses less digits than its factorization.

1664041126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221868 (or 221857 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 1664041126 is about 40792.6601976385. The cubic root of 1664041126 is about 1185.0081897515.

Adding to 1664041126 its reverse (6211404661), we get a palindrome (7875445787).

The spelling of 1664041126 in words is "one billion, six hundred sixty-four million, forty-one thousand, one hundred twenty-six".