6601890979 has 2 divisors, whose sum is σ = 6601890980. Its totient is φ = 6601890978.

The previous prime is 6601890973. The next prime is 6601891033. The reversal of 6601890979 is 9790981066.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6601890979 - 2⁵ = 6601890947 is a prime.

It is not a weakly prime, because it can be changed into another prime (6601890973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3300945489 + 3300945490.

It is an arithmetic number, because the mean of its divisors is an integer number (3300945490).

Almost surely, 2^6601890979 is an apocalyptic number.

6601890979 is a deficient number, since it is larger than the sum of its proper divisors (1).

6601890979 is an equidigital number, since it uses as much as digits as its factorization.

6601890979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1469664, while the sum is 55.

The square root of 6601890979 is about 81252.0213840862. The cubic root of 6601890979 is about 1875.9565824918.

The spelling of 6601890979 in words is "six billion, six hundred one million, eight hundred ninety thousand, nine hundred seventy-nine".