366081858156121 has 4 divisors (see below), whose sum is σ = 381998460684672. Its totient is φ = 350165255627572.

The previous prime is 366081858156109. The next prime is 366081858156143. The reversal of 366081858156121 is 121651858180663.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 366081858156121 - 2¹¹ = 366081858154073 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 366081858156121.

It is not an unprimeable number, because it can be changed into a prime (366081858156221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7958301264241 + ... + 7958301264286.

It is an arithmetic number, because the mean of its divisors is an integer number (95499615171168).

Almost surely, 2^{366081858156121} is an apocalyptic number.

It is an amenable number.

366081858156121 is a deficient number, since it is larger than the sum of its proper divisors (15916602528551).

366081858156121 is a wasteful number, since it uses less digits than its factorization.

366081858156121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15916602528550.

The product of its (nonzero) digits is 16588800, while the sum is 61.

The spelling of 366081858156121 in words is "three hundred sixty-six trillion, eighty-one billion, eight hundred fifty-eight million, one hundred fifty-six thousand, one hundred twenty-one".