1661966296 has 64 divisors (see below), whose sum is σ = 3351490560. Its totient is φ = 771120000.

The previous prime is 1661966287. The next prime is 1661966311. The reversal of 1661966296 is 6926691661.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 650221 + ... + 652771.

It is an arithmetic number, because the mean of its divisors is an integer number (52367040).

Almost surely, 2^1661966296 is an apocalyptic number.

It is an amenable number.

1661966296 is an abundant number, since it is smaller than the sum of its proper divisors (1689524264).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1661966296 is a wasteful number, since it uses less digits than its factorization.

1661966296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2696 (or 2692 counting only the distinct ones).

The product of its digits is 1259712, while the sum is 52.

The square root of 1661966296 is about 40767.2208520522. The cubic root of 1661966296 is about 1184.5154709328.

The spelling of 1661966296 in words is "one billion, six hundred sixty-one million, nine hundred sixty-six thousand, two hundred ninety-six".