1661683037 has 8 divisors (see below), whose sum is σ = 2010776256. Its totient is φ = 1340517312.

The previous prime is 1661683027. The next prime is 1661683039. The reversal of 1661683037 is 7303861661.

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

It is a cyclic number.

It is not a de Polignac number, because 1661683037 - 2¹⁶ = 1661617501 is a prime.

It is a super-3 number, since 3×1661683037³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1661682985 and 1661683003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1661683039) 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, 6981743 + ... + 6981980.

It is an arithmetic number, because the mean of its divisors is an integer number (251347032).

Almost surely, 2^1661683037 is an apocalyptic number.

1661683037 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1661683037 is a deficient number, since it is larger than the sum of its proper divisors (349093219).

1661683037 is a wasteful number, since it uses less digits than its factorization.

1661683037 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13963747.

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 1661683037 is about 40763.7466016067. The cubic root of 1661683037 is about 1184.4481723897.

The spelling of 1661683037 in words is "one billion, six hundred sixty-one million, six hundred eighty-three thousand, thirty-seven".