6555201021699 has 32 divisors (see below), whose sum is σ = 9545006407680. Its totient is φ = 3968613369600.

The previous prime is 6555201021671. The next prime is 6555201021793. The reversal of 6555201021699 is 9961201025556.

It is a happy number.

It is not a de Polignac number, because 6555201021699 - 2⁵ = 6555201021667 is a prime.

It is a super-2 number, since 2×6555201021699² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6555201021619) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 366019357 + ... + 366037265.

It is an arithmetic number, because the mean of its divisors is an integer number (298281450240).

Almost surely, 2^{6555201021699} is an apocalyptic number.

6555201021699 is a deficient number, since it is larger than the sum of its proper divisors (2989805385981).

6555201021699 is a wasteful number, since it uses less digits than its factorization.

6555201021699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29131.

The product of its (nonzero) digits is 1458000, while the sum is 51.

The spelling of 6555201021699 in words is "six trillion, five hundred fifty-five billion, two hundred one million, twenty-one thousand, six hundred ninety-nine".