6121661603767 has 2 divisors, whose sum is σ = 6121661603768. Its totient is φ = 6121661603766.

The previous prime is 6121661603737. The next prime is 6121661603801. The reversal of 6121661603767 is 7673061661216.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6121661603767 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6121661603737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3060830801883 + 3060830801884.

It is an arithmetic number, because the mean of its divisors is an integer number (3060830801884).

Almost surely, 2^{6121661603767} is an apocalyptic number.

6121661603767 is a deficient number, since it is larger than the sum of its proper divisors (1).

6121661603767 is an equidigital number, since it uses as much as digits as its factorization.

6121661603767 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2286144, while the sum is 52.

The spelling of 6121661603767 in words is "six trillion, one hundred twenty-one billion, six hundred sixty-one million, six hundred three thousand, seven hundred sixty-seven".