6920655386 has 4 divisors (see below), whose sum is σ = 10380983082. Its totient is φ = 3460327692.

The previous prime is 6920655383. The next prime is 6920655431. The reversal of 6920655386 is 6835560296.

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

It can be written as a sum of positive squares in only one way, i.e., 3723318361 + 3197337025 = 61019^2 + 56545^2 .

It is not an unprimeable number, because it can be changed into a prime (6920655383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1730163845 + ... + 1730163848.

Almost surely, 2^6920655386 is an apocalyptic number.

6920655386 is a deficient number, since it is larger than the sum of its proper divisors (3460327696).

6920655386 is a wasteful number, since it uses less digits than its factorization.

6920655386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3460327695.

The product of its (nonzero) digits is 2332800, while the sum is 50.

The square root of 6920655386 is about 83190.4765342764. The cubic root of 6920655386 is about 1905.6760446427.

The spelling of 6920655386 in words is "six billion, nine hundred twenty million, six hundred fifty-five thousand, three hundred eighty-six".