1680996477 has 16 divisors (see below), whose sum is σ = 2287123328. Its totient is φ = 1097971200.

The previous prime is 1680996461. The next prime is 1680996487. The reversal of 1680996477 is 7746990861.

It is not a de Polignac number, because 1680996477 - 2⁴ = 1680996461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1680996437) by changing a digit.

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, 7653 + ... + 58485.

It is an arithmetic number, because the mean of its divisors is an integer number (142945208).

Almost surely, 2^1680996477 is an apocalyptic number.

It is an amenable number.

1680996477 is a deficient number, since it is larger than the sum of its proper divisors (606126851).

1680996477 is a wasteful number, since it uses less digits than its factorization.

1680996477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51060.

The product of its (nonzero) digits is 4572288, while the sum is 57.

The square root of 1680996477 is about 40999.9570365629. The cubic root of 1680996477 is about 1189.0193830466.

The spelling of 1680996477 in words is "one billion, six hundred eighty million, nine hundred ninety-six thousand, four hundred seventy-seven".