6905887745 has 4 divisors (see below), whose sum is σ = 8287065300. Its totient is φ = 5524710192.

The previous prime is 6905887741. The next prime is 6905887759. The reversal of 6905887745 is 5477885096.

It is a happy number.

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 749445376 + 6156442369 = 27376^2 + 78463^2 .

It is a cyclic number.

It is not a de Polignac number, because 6905887745 - 2² = 6905887741 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6905887741) 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, 690588770 + ... + 690588779.

It is an arithmetic number, because the mean of its divisors is an integer number (2071766325).

Almost surely, 2^6905887745 is an apocalyptic number.

It is an amenable number.

6905887745 is a deficient number, since it is larger than the sum of its proper divisors (1381177555).

6905887745 is a wasteful number, since it uses less digits than its factorization.

6905887745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1381177554.

The product of its (nonzero) digits is 16934400, while the sum is 59.

The square root of 6905887745 is about 83101.6711324147. The cubic root of 6905887745 is about 1904.3196037152.

The spelling of 6905887745 in words is "six billion, nine hundred five million, eight hundred eighty-seven thousand, seven hundred forty-five".