78166202401 has 8 divisors (see below), whose sum is σ = 89733400064. Its totient is φ = 66699154080.

The previous prime is 78166202377. The next prime is 78166202417. The reversal of 78166202401 is 10420266187.

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 78166202401 - 2¹¹ = 78166200353 is a prime.

It is a super-2 number, since 2×78166202401² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78166202441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25035660 + ... + 25038781.

It is an arithmetic number, because the mean of its divisors is an integer number (11216675008).

Almost surely, 2^78166202401 is an apocalyptic number.

It is an amenable number.

78166202401 is a deficient number, since it is larger than the sum of its proper divisors (11567197663).

78166202401 is a wasteful number, since it uses less digits than its factorization.

78166202401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50074671.

The product of its (nonzero) digits is 32256, while the sum is 37.

Adding to 78166202401 its reverse (10420266187), we get a palindrome (88586468588).

The spelling of 78166202401 in words is "seventy-eight billion, one hundred sixty-six million, two hundred two thousand, four hundred one".