1000103777661 has 4 divisors (see below), whose sum is σ = 1333471703552. Its totient is φ = 666735851772.

The previous prime is 1000103777653. The next prime is 1000103777671. The reversal of 1000103777661 is 1667773010001.

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 not a de Polignac number, because 1000103777661 - 2³ = 1000103777653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000103777671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166683962941 + ... + 166683962946.

It is an arithmetic number, because the mean of its divisors is an integer number (333367925888).

Almost surely, 2^{1000103777661} is an apocalyptic number.

It is an amenable number.

1000103777661 is a deficient number, since it is larger than the sum of its proper divisors (333367925891).

1000103777661 is an equidigital number, since it uses as much as digits as its factorization.

1000103777661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333367925890.

The product of its (nonzero) digits is 37044, while the sum is 39.

Adding to 1000103777661 its reverse (1667773010001), we get a palindrome (2667876787662).

The spelling of 1000103777661 in words is "one trillion, one hundred three million, seven hundred seventy-seven thousand, six hundred sixty-one".