2166820601 has 8 divisors (see below), whose sum is σ = 2365653600. Its totient is φ = 1968295840.

The previous prime is 2166820577. The next prime is 2166820613. The reversal of 2166820601 is 1060286612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2166820601 is a prime.

It is a super-2 number, since 2×2166820601² = 9390223033836002402, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2166820661) 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, 62231 + ... + 90588.

It is an arithmetic number, because the mean of its divisors is an integer number (295706700).

Almost surely, 2^2166820601 is an apocalyptic number.

It is an amenable number.

2166820601 is a deficient number, since it is larger than the sum of its proper divisors (198832999).

2166820601 is a wasteful number, since it uses less digits than its factorization.

2166820601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154119.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 2166820601 is about 46549.1203031808. The cubic root of 2166820601 is about 1294.0199899048.

The spelling of 2166820601 in words is "two billion, one hundred sixty-six million, eight hundred twenty thousand, six hundred one".