1020666116057 has 4 divisors (see below), whose sum is σ = 1166475561216. Its totient is φ = 874856670900.

The previous prime is 1020666116053. The next prime is 1020666116087. The reversal of 1020666116057 is 7506116660201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1020666116057 - 2² = 1020666116053 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1020666116053) 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, 72904722569 + ... + 72904722582.

It is an arithmetic number, because the mean of its divisors is an integer number (291618890304).

Almost surely, 2^{1020666116057} is an apocalyptic number.

It is an amenable number.

1020666116057 is a deficient number, since it is larger than the sum of its proper divisors (145809445159).

1020666116057 is an equidigital number, since it uses as much as digits as its factorization.

1020666116057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145809445158.

The product of its (nonzero) digits is 90720, while the sum is 41.

The spelling of 1020666116057 in words is "one trillion, twenty billion, six hundred sixty-six million, one hundred sixteen thousand, fifty-seven".