7682757821 has 8 divisors (see below), whose sum is σ = 7835990400. Its totient is φ = 7530924960.

The previous prime is 7682757773. The next prime is 7682757829. The reversal of 7682757821 is 1287572867.

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

It is a cyclic number.

It is not a de Polignac number, because 7682757821 - 2¹⁰ = 7682756797 is a prime.

It is a super-2 number, since 2×7682757821² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7682757829) 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, 338840 + ... + 360801.

It is an arithmetic number, because the mean of its divisors is an integer number (979498800).

Almost surely, 2^7682757821 is an apocalyptic number.

It is an amenable number.

7682757821 is a deficient number, since it is larger than the sum of its proper divisors (153232579).

7682757821 is a wasteful number, since it uses less digits than its factorization.

7682757821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 699859.

The product of its digits is 2634240, while the sum is 53.

The square root of 7682757821 is about 87651.3423799088. The cubic root of 7682757821 is about 1973.2057899334.

The spelling of 7682757821 in words is "seven billion, six hundred eighty-two million, seven hundred fifty-seven thousand, eight hundred twenty-one".