6690550001 has 4 divisors (see below), whose sum is σ = 6692561904. Its totient is φ = 6688538100.

The previous prime is 6690549979. The next prime is 6690550019. The reversal of 6690550001 is 1000550966.

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 6690550001 - 2²⁶ = 6623441137 is a prime.

It is a super-2 number, since 2×6690550001² = 89526918631762200002, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6690550001.

It is not an unprimeable number, because it can be changed into a prime (6690550021) 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, 1000955 + ... + 1007616.

It is an arithmetic number, because the mean of its divisors is an integer number (1673140476).

Almost surely, 2^6690550001 is an apocalyptic number.

It is an amenable number.

6690550001 is a deficient number, since it is larger than the sum of its proper divisors (2011903).

6690550001 is a wasteful number, since it uses less digits than its factorization.

6690550001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2011902.

The product of its (nonzero) digits is 8100, while the sum is 32.

The square root of 6690550001 is about 81795.7822934655. The cubic root of 6690550001 is about 1884.3168870018.

The spelling of 6690550001 in words is "six billion, six hundred ninety million, five hundred fifty thousand, one".