6625661101 has 4 divisors (see below), whose sum is σ = 6635250304. Its totient is φ = 6616071900.

The previous prime is 6625661099. The next prime is 6625661123. The reversal of 6625661101 is 1011665266.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 6625661101 - 2¹ = 6625661099 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6625661401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4793565 + ... + 4794946.

It is an arithmetic number, because the mean of its divisors is an integer number (1658812576).

Almost surely, 2^6625661101 is an apocalyptic number.

It is an amenable number.

6625661101 is a deficient number, since it is larger than the sum of its proper divisors (9589203).

6625661101 is an equidigital number, since it uses as much as digits as its factorization.

6625661101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9589202.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 6625661101 is about 81398.1639903505. The cubic root of 6625661101 is about 1878.2053475928.

The spelling of 6625661101 in words is "six billion, six hundred twenty-five million, six hundred sixty-one thousand, one hundred one".