6661677983 has 8 divisors (see below), whose sum is σ = 6690681600. Its totient is φ = 6632710560.

The previous prime is 6661677931. The next prime is 6661678003. The reversal of 6661677983 is 3897761666.

It is a happy number.

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 6661677983 - 2⁸ = 6661677727 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 (6661677083) 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, 399293 + ... + 415641.

It is an arithmetic number, because the mean of its divisors is an integer number (836335200).

Almost surely, 2^6661677983 is an apocalyptic number.

6661677983 is a deficient number, since it is larger than the sum of its proper divisors (29003617).

6661677983 is a wasteful number, since it uses less digits than its factorization.

6661677983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18097.

The product of its digits is 13716864, while the sum is 59.

The square root of 6661677983 is about 81619.1030519204. The cubic root of 6661677983 is about 1881.6024875090.

The spelling of 6661677983 in words is "six billion, six hundred sixty-one million, six hundred seventy-seven thousand, nine hundred eighty-three".