1662420213650 has 24 divisors (see below), whose sum is σ = 3533830397760. Its totient is φ = 569972644560.

The previous prime is 1662420213599. The next prime is 1662420213679. The reversal of 1662420213650 is 563120242661.

It is a super-2 number, since 2×1662420213650² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2374885670 + ... + 2374886369.

It is an arithmetic number, because the mean of its divisors is an integer number (147242933240).

Almost surely, 2^{1662420213650} is an apocalyptic number.

1662420213650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1662420213650 is an abundant number, since it is smaller than the sum of its proper divisors (1871410184110).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1662420213650 is a wasteful number, since it uses less digits than its factorization.

1662420213650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4749772058 (or 4749772053 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 38.

The spelling of 1662420213650 in words is "one trillion, six hundred sixty-two billion, four hundred twenty million, two hundred thirteen thousand, six hundred fifty".