1662646742020 has 24 divisors (see below), whose sum is σ = 3808972536768. Its totient is φ = 604598815200.

The previous prime is 1662646741909. The next prime is 1662646742077. The reversal of 1662646742020 is 202476462661.

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, 3778742376 + ... + 3778742815.

It is an arithmetic number, because the mean of its divisors is an integer number (158707189032).

Almost surely, 2^{1662646742020} is an apocalyptic number.

1662646742020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1662646742020 is an abundant number, since it is smaller than the sum of its proper divisors (2146325794748).

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

1662646742020 is a wasteful number, since it uses less digits than its factorization.

1662646742020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7557485211 (or 7557485209 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 46.

The spelling of 1662646742020 in words is "one trillion, six hundred sixty-two billion, six hundred forty-six million, seven hundred forty-two thousand, twenty".