6723779257 has 8 divisors (see below), whose sum is σ = 7245806400. Its totient is φ = 6202439760.

The previous prime is 6723779219. The next prime is 6723779263. The reversal of 6723779257 is 7529773276.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6723779257 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6723779198 and 6723779207.

It is not an unprimeable number, because it can be changed into a prime (6723779057) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151507 + ... + 190792.

It is an arithmetic number, because the mean of its divisors is an integer number (905725800).

Almost surely, 2^6723779257 is an apocalyptic number.

It is an amenable number.

6723779257 is a deficient number, since it is larger than the sum of its proper divisors (522027143).

6723779257 is a wasteful number, since it uses less digits than its factorization.

6723779257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343823.

The product of its digits is 7779240, while the sum is 55.

The square root of 6723779257 is about 81998.6539950504. The cubic root of 6723779257 is about 1887.4312833308.

The spelling of 6723779257 in words is "six billion, seven hundred twenty-three million, seven hundred seventy-nine thousand, two hundred fifty-seven".