2666320400 has 30 divisors (see below), whose sum is σ = 6405835722. Its totient is φ = 1066528000.

The previous prime is 2666320373. The next prime is 2666320411. The reversal of 2666320400 is 40236662.

It can be written as a sum of positive squares in 3 ways, for example, as 456976 + 2665863424 = 676^2 + 51632^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3332501 + ... + 3333300.

Almost surely, 2^2666320400 is an apocalyptic number.

2666320400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2666320400 is an abundant number, since it is smaller than the sum of its proper divisors (3739515322).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2666320400 is a wasteful number, since it uses less digits than its factorization.

2666320400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6665819 (or 6665808 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 29.

The square root of 2666320400 is about 51636.4251280044. The cubic root of 2666320400 is about 1386.6625241288.

The spelling of 2666320400 in words is "two billion, six hundred sixty-six million, three hundred twenty thousand, four hundred".