6685522501 has 4 divisors (see below), whose sum is σ = 7640597152. Its totient is φ = 5730447852.

The previous prime is 6685522483. The next prime is 6685522517. The reversal of 6685522501 is 1052255866.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1052255866 = 2 ⋅526127933.

It is a cyclic number.

It is not a de Polignac number, because 6685522501 - 2¹³ = 6685514309 is a prime.

It is a super-2 number, since 2×6685522501² = 89392422222754590002, which 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 (6685522601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 477537315 + ... + 477537328.

It is an arithmetic number, because the mean of its divisors is an integer number (1910149288).

Almost surely, 2^6685522501 is an apocalyptic number.

It is an amenable number.

6685522501 is a deficient number, since it is larger than the sum of its proper divisors (955074651).

6685522501 is an equidigital number, since it uses as much as digits as its factorization.

6685522501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 955074650.

The product of its (nonzero) digits is 144000, while the sum is 40.

The square root of 6685522501 is about 81765.0444933530. The cubic root of 6685522501 is about 1883.8447894405.

The spelling of 6685522501 in words is "six billion, six hundred eighty-five million, five hundred twenty-two thousand, five hundred one".