1005070221661 has 8 divisors (see below), whose sum is σ = 1154147623200. Its totient is φ = 865610717040.

The previous prime is 1005070221637. The next prime is 1005070221709. The reversal of 1005070221661 is 1661220705001.

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

It is a cyclic number.

It is not a de Polignac number, because 1005070221661 - 2⁵ = 1005070221629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1005070221361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2404474006 + ... + 2404474423.

It is an arithmetic number, because the mean of its divisors is an integer number (144268452900).

Almost surely, 2^{1005070221661} is an apocalyptic number.

1005070221661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1005070221661 is a deficient number, since it is larger than the sum of its proper divisors (149077401539).

1005070221661 is a wasteful number, since it uses less digits than its factorization.

1005070221661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4808948459.

The product of its (nonzero) digits is 5040, while the sum is 31.

Adding to 1005070221661 its reverse (1661220705001), we get a palindrome (2666290926662).

The spelling of 1005070221661 in words is "one trillion, five billion, seventy million, two hundred twenty-one thousand, six hundred sixty-one".