6677451989 has 4 divisors (see below), whose sum is σ = 7191102156. Its totient is φ = 6163801824.

The previous prime is 6677451953. The next prime is 6677452051. The reversal of 6677451989 is 9891547766.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3689955025 + 2987496964 = 60745^2 + 54658^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6677451989 is a prime.

It is a super-2 number, since 2×6677451989² = 89176730130800112242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6677451919) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 256825064 + ... + 256825089.

It is an arithmetic number, because the mean of its divisors is an integer number (1797775539).

Almost surely, 2^6677451989 is an apocalyptic number.

It is an amenable number.

6677451989 is a deficient number, since it is larger than the sum of its proper divisors (513650167).

6677451989 is a wasteful number, since it uses less digits than its factorization.

6677451989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513650166.

The product of its digits is 22861440, while the sum is 62.

The square root of 6677451989 is about 81715.6777430133. The cubic root of 6677451989 is about 1883.0864486218.

The spelling of 6677451989 in words is "six billion, six hundred seventy-seven million, four hundred fifty-one thousand, nine hundred eighty-nine".