404424346661 has 4 divisors (see below), whose sum is σ = 404426717772. Its totient is φ = 404421975552.

The previous prime is 404424346657. The next prime is 404424346673. The reversal of 404424346661 is 166643424404.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 209117802436 + 195306544225 = 457294^2 + 441935^2 .

It is a cyclic number.

It is not a de Polignac number, because 404424346661 - 2² = 404424346657 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 (404424346691) 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, 908060 + ... + 1278053.

It is an arithmetic number, because the mean of its divisors is an integer number (101106679443).

Almost surely, 2^404424346661 is an apocalyptic number.

It is an amenable number.

404424346661 is a deficient number, since it is larger than the sum of its proper divisors (2371111).

404424346661 is a wasteful number, since it uses less digits than its factorization.

404424346661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2371110.

The product of its (nonzero) digits is 1327104, while the sum is 44.

It can be divided in two parts, 4044243 and 46661, that added together give a palindrome (4090904).

The spelling of 404424346661 in words is "four hundred four billion, four hundred twenty-four million, three hundred forty-six thousand, six hundred sixty-one".