400166413779 has 8 divisors (see below), whose sum is σ = 582060238272. Its totient is φ = 242525099240.

The previous prime is 400166413763. The next prime is 400166413841. The reversal of 400166413779 is 977314661004.

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 400166413779 - 2⁴ = 400166413763 is a prime.

It is not an unprimeable number, because it can be changed into a prime (400166413579) 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 7 ways as a sum of consecutive naturals, for example, 6063127449 + ... + 6063127514.

It is an arithmetic number, because the mean of its divisors is an integer number (72757529784).

Almost surely, 2^400166413779 is an apocalyptic number.

400166413779 is a deficient number, since it is larger than the sum of its proper divisors (181893824493).

400166413779 is a wasteful number, since it uses less digits than its factorization.

400166413779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12126254977.

The product of its (nonzero) digits is 762048, while the sum is 48.

The spelling of 400166413779 in words is "four hundred billion, one hundred sixty-six million, four hundred thirteen thousand, seven hundred seventy-nine".