21624210166601 has 8 divisors (see below), whose sum is σ = 25316148488064. Its totient is φ = 18082963205280.

The previous prime is 21624210166589. The next prime is 21624210166633. The reversal of 21624210166601 is 10666101242612.

It is a happy number.

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 21624210166601 - 2²² = 21624205972297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21624210166651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37672839725 + ... + 37672840298.

It is an arithmetic number, because the mean of its divisors is an integer number (3164518561008).

Almost surely, 2^{21624210166601} is an apocalyptic number.

It is an amenable number.

21624210166601 is a deficient number, since it is larger than the sum of its proper divisors (3691938321463).

21624210166601 is an equidigital number, since it uses as much as digits as its factorization.

21624210166601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75345680071.

The product of its (nonzero) digits is 41472, while the sum is 38.

The spelling of 21624210166601 in words is "twenty-one trillion, six hundred twenty-four billion, two hundred ten million, one hundred sixty-six thousand, six hundred one".