6908706157 has 4 divisors (see below), whose sum is σ = 6911538876. Its totient is φ = 6905873440.

The previous prime is 6908706137. The next prime is 6908706187. The reversal of 6908706157 is 7516078096.

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 4107015396 + 2801690761 = 64086^2 + 52931^2 .

It is a cyclic number.

It is not a de Polignac number, because 6908706157 - 2³¹ = 4761222509 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6908706157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6908706137) 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, 1412698 + ... + 1417579.

It is an arithmetic number, because the mean of its divisors is an integer number (1727884719).

Almost surely, 2^6908706157 is an apocalyptic number.

It is an amenable number.

6908706157 is a deficient number, since it is larger than the sum of its proper divisors (2832719).

6908706157 is a wasteful number, since it uses less digits than its factorization.

6908706157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2832718.

The product of its (nonzero) digits is 635040, while the sum is 49.

The square root of 6908706157 is about 83118.6270158501. The cubic root of 6908706157 is about 1904.5786303817.

The spelling of 6908706157 in words is "six billion, nine hundred eight million, seven hundred six thousand, one hundred fifty-seven".