400050661 has 8 divisors (see below), whose sum is σ = 421499520. Its totient is φ = 378939792.

The previous prime is 400050631. The next prime is 400050667. The reversal of 400050661 is 166050004.

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 400050661 - 2¹³ = 400042469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400050667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82066 + ... + 86803.

It is an arithmetic number, because the mean of its divisors is an integer number (52687440).

Almost surely, 2^400050661 is an apocalyptic number.

It is an amenable number.

400050661 is a deficient number, since it is larger than the sum of its proper divisors (21448859).

400050661 is a wasteful number, since it uses less digits than its factorization.

400050661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168995.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 400050661 is about 20001.2664849004. The cubic root of 400050661 is about 736.8374045349.

The spelling of 400050661 in words is "four hundred million, fifty thousand, six hundred sixty-one".