6694985377 has 2 divisors, whose sum is σ = 6694985378. Its totient is φ = 6694985376.

The previous prime is 6694985333. The next prime is 6694985413. The reversal of 6694985377 is 7735894966.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4251561616 + 2443423761 = 65204^2 + 49431^2 .

It is a cyclic number.

It is not a de Polignac number, because 6694985377 - 2¹⁵ = 6694952609 is a prime.

It is a super-3 number, since 3×6694985377³ (a number of 30 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (6694985677) 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 as a sum of consecutive naturals, namely, 3347492688 + 3347492689.

It is an arithmetic number, because the mean of its divisors is an integer number (3347492689).

Almost surely, 2^6694985377 is an apocalyptic number.

It is an amenable number.

6694985377 is a deficient number, since it is larger than the sum of its proper divisors (1).

6694985377 is an equidigital number, since it uses as much as digits as its factorization.

6694985377 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 68584320, while the sum is 64.

The square root of 6694985377 is about 81822.8902997199. The cubic root of 6694985377 is about 1884.7331859969.

The spelling of 6694985377 in words is "six billion, six hundred ninety-four million, nine hundred eighty-five thousand, three hundred seventy-seven".