1661266334 has 64 divisors (see below), whose sum is σ = 3193827840. Its totient is φ = 630322560.

The previous prime is 1661266301. The next prime is 1661266339. The reversal of 1661266334 is 4336621661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1661266339) 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, 859349 + ... + 861279.

It is an arithmetic number, because the mean of its divisors is an integer number (49903560).

Almost surely, 2^1661266334 is an apocalyptic number.

1661266334 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1661266334 is a deficient number, since it is larger than the sum of its proper divisors (1532561506).

1661266334 is a wasteful number, since it uses less digits than its factorization.

1661266334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2145.

The product of its digits is 93312, while the sum is 38.

The square root of 1661266334 is about 40758.6350850958. The cubic root of 1661266334 is about 1184.3491554375.

Adding to 1661266334 its reverse (4336621661), we get a palindrome (5997887995).

The spelling of 1661266334 in words is "one billion, six hundred sixty-one million, two hundred sixty-six thousand, three hundred thirty-four".