1662801550555 has 8 divisors (see below), whose sum is σ = 2112736087872. Its totient is φ = 1251991755648.

The previous prime is 1662801550541. The next prime is 1662801550583. The reversal of 1662801550555 is 5550551082661.

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 1662801550555 - 2¹⁷ = 1662801419483 is a prime.

It is a super-2 number, since 2×1662801550555² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1662801550499 and 1662801550508.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9781185507 + ... + 9781185676.

It is an arithmetic number, because the mean of its divisors is an integer number (264092010984).

Almost surely, 2^{1662801550555} is an apocalyptic number.

1662801550555 is a deficient number, since it is larger than the sum of its proper divisors (449934537317).

1662801550555 is a wasteful number, since it uses less digits than its factorization.

1662801550555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19562371205.

The product of its (nonzero) digits is 1800000, while the sum is 49.

The spelling of 1662801550555 in words is "one trillion, six hundred sixty-two billion, eight hundred one million, five hundred fifty thousand, five hundred fifty-five".