1021660055662 has 4 divisors (see below), whose sum is σ = 1532490083496. Its totient is φ = 510830027830.

The previous prime is 1021660055629. The next prime is 1021660055707. The reversal of 1021660055662 is 2665500661201.

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

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255415013914 + ... + 255415013917.

It is an arithmetic number, because the mean of its divisors is an integer number (383122520874).

Almost surely, 2^{1021660055662} is an apocalyptic number.

1021660055662 is a deficient number, since it is larger than the sum of its proper divisors (510830027834).

1021660055662 is an equidigital number, since it uses as much as digits as its factorization.

1021660055662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510830027833.

The product of its (nonzero) digits is 129600, while the sum is 40.

The spelling of 1021660055662 in words is "one trillion, twenty-one billion, six hundred sixty million, fifty-five thousand, six hundred sixty-two".