111666101150557 has 2 divisors, whose sum is σ = 111666101150558. Its totient is φ = 111666101150556.

The previous prime is 111666101150543. The next prime is 111666101150623. The reversal of 111666101150557 is 755051101666111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59431672129636 + 52234429020921 = 7709194^2 + 7227339^2 .

It is a cyclic number.

It is not a de Polignac number, because 111666101150557 - 2¹¹ = 111666101148509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111666101150537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55833050575278 + 55833050575279.

It is an arithmetic number, because the mean of its divisors is an integer number (55833050575279).

Almost surely, 2^{111666101150557} is an apocalyptic number.

It is an amenable number.

111666101150557 is a deficient number, since it is larger than the sum of its proper divisors (1).

111666101150557 is an equidigital number, since it uses as much as digits as its factorization.

111666101150557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 189000, while the sum is 46.

The spelling of 111666101150557 in words is "one hundred eleven trillion, six hundred sixty-six billion, one hundred one million, one hundred fifty thousand, five hundred fifty-seven".