3662120861999 has 4 divisors (see below), whose sum is σ = 3662158533936. Its totient is φ = 3662083190064.

The previous prime is 3662120861989. The next prime is 3662120862007. The reversal of 3662120861999 is 9991680212663.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3662120861999 - 2²⁴ = 3662104084783 is a prime.

It is a super-2 number, since 2×3662120861999² (a number of 26 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 (3662120861989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18689774 + ... + 18884699.

It is an arithmetic number, because the mean of its divisors is an integer number (915539633484).

Almost surely, 2^{3662120861999} is an apocalyptic number.

3662120861999 is a deficient number, since it is larger than the sum of its proper divisors (37671937).

3662120861999 is an equidigital number, since it uses as much as digits as its factorization.

3662120861999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37671936.

The product of its (nonzero) digits is 15116544, while the sum is 62.

The spelling of 3662120861999 in words is "three trillion, six hundred sixty-two billion, one hundred twenty million, eight hundred sixty-one thousand, nine hundred ninety-nine".