2400400204666 has 4 divisors (see below), whose sum is σ = 3600600307002. Its totient is φ = 1200200102332.

The previous prime is 2400400204627. The next prime is 2400400204667. The reversal of 2400400204666 is 6664020040042.

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

It can be written as a sum of positive squares in only one way, i.e., 2135616890625 + 264783314041 = 1461375^2 + 514571^2 .

It is a super-2 number, since 2×2400400204666² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2400400204667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600100051165 + ... + 600100051168.

Almost surely, 2^{2400400204666} is an apocalyptic number.

2400400204666 is a deficient number, since it is larger than the sum of its proper divisors (1200200102336).

2400400204666 is a wasteful number, since it uses less digits than its factorization.

2400400204666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1200200102335.

The product of its (nonzero) digits is 55296, while the sum is 34.

The spelling of 2400400204666 in words is "two trillion, four hundred billion, four hundred million, two hundred four thousand, six hundred sixty-six".