206610002456021 has 8 divisors (see below), whose sum is σ = 217128802079904. Its totient is φ = 196350926279760.

The previous prime is 206610002456009. The next prime is 206610002456041. The reversal of 206610002456021 is 120654200016602.

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 206610002456021 - 2⁶ = 206610002455957 is a prime.

It is a super-2 number, since 2×206610002456021² (a number of 29 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 (206610002456041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64930860275 + ... + 64930863456.

It is an arithmetic number, because the mean of its divisors is an integer number (27141100259988).

Almost surely, 2^{206610002456021} is an apocalyptic number.

It is an amenable number.

206610002456021 is a deficient number, since it is larger than the sum of its proper divisors (10518799623883).

206610002456021 is a wasteful number, since it uses less digits than its factorization.

206610002456021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129861723811.

The product of its (nonzero) digits is 34560, while the sum is 35.

The spelling of 206610002456021 in words is "two hundred six trillion, six hundred ten billion, two million, four hundred fifty-six thousand, twenty-one".