401660126 has 16 divisors (see below), whose sum is σ = 690125184. Its totient is φ = 171748824.

The previous prime is 401660117. The next prime is 401660159. The reversal of 401660126 is 621066104.

It is a happy number.

It is a super-2 number, since 2×401660126² = 322661713636671752, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 401660095 and 401660104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26180 + ... + 38583.

It is an arithmetic number, because the mean of its divisors is an integer number (43132824).

Almost surely, 2^401660126 is an apocalyptic number.

401660126 is a deficient number, since it is larger than the sum of its proper divisors (288465058).

401660126 is a wasteful number, since it uses less digits than its factorization.

401660126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65215.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 401660126 is about 20041.4601763444. The cubic root of 401660126 is about 737.8242188751.

The spelling of 401660126 in words is "four hundred one million, six hundred sixty thousand, one hundred twenty-six".