1621050070666 has 8 divisors (see below), whose sum is σ = 2618619344964. Its totient is φ = 748176955680.

The previous prime is 1621050070643. The next prime is 1621050070691. The reversal of 1621050070666 is 6660700501261.

It can be written as a sum of positive squares in 2 ways, for example, as 1616140125625 + 4909945041 = 1271275^2 + 70071^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31174039795 + ... + 31174039846.

Almost surely, 2^{1621050070666} is an apocalyptic number.

1621050070666 is a deficient number, since it is larger than the sum of its proper divisors (997569274298).

1621050070666 is a wasteful number, since it uses less digits than its factorization.

1621050070666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62348079656.

The product of its (nonzero) digits is 90720, while the sum is 40.

The spelling of 1621050070666 in words is "one trillion, six hundred twenty-one billion, fifty million, seventy thousand, six hundred sixty-six".