400166426608 has 80 divisors (see below), whose sum is σ = 853094773440. Its totient is φ = 180700895232.

The previous prime is 400166426507. The next prime is 400166426623. The reversal of 400166426608 is 806624661004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3907060 + ... + 4008172.

It is an arithmetic number, because the mean of its divisors is an integer number (10663684668).

Almost surely, 2^400166426608 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 400166426608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (426547386720).

400166426608 is an abundant number, since it is smaller than the sum of its proper divisors (452928346832).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

400166426608 is a wasteful number, since it uses less digits than its factorization.

400166426608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101546 (or 101540 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 43.

The spelling of 400166426608 in words is "four hundred billion, one hundred sixty-six million, four hundred twenty-six thousand, six hundred eight".