401851066 has 8 divisors (see below), whose sum is σ = 638234100. Its totient is φ = 189106368.

The previous prime is 401851033. The next prime is 401851069. The reversal of 401851066 is 660158104.

It can be written as a sum of positive squares in 2 ways, for example, as 398840841 + 3010225 = 19971^2 + 1735^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×401851066² = 322968558490672712, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (401851069) 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, 5909541 + ... + 5909608.

Almost surely, 2^401851066 is an apocalyptic number.

401851066 is a deficient number, since it is larger than the sum of its proper divisors (236383034).

401851066 is a wasteful number, since it uses less digits than its factorization.

401851066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11819168.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 401851066 is about 20046.2232353129. The cubic root of 401851066 is about 737.9411152504.

The spelling of 401851066 in words is "four hundred one million, eight hundred fifty-one thousand, sixty-six".