2026400664 has 32 divisors (see below), whose sum is σ = 5067141120. Its totient is φ = 675314976.

The previous prime is 2026400647. The next prime is 2026400681. The reversal of 2026400664 is 4660046202.

It is an interprime number because it is at equal distance from previous prime (2026400647) and next prime (2026400681).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 164529 + ... + 176415.

It is an arithmetic number, because the mean of its divisors is an integer number (158348160).

Almost surely, 2^2026400664 is an apocalyptic number.

2026400664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2026400664 is an abundant number, since it is smaller than the sum of its proper divisors (3040740456).

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

2026400664 is a wasteful number, since it uses less digits than its factorization.

2026400664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18999 (or 18995 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 2026400664 is about 45015.5602430982. The cubic root of 2026400664 is about 1265.4406259766.

Adding to 2026400664 its reverse (4660046202), we get a palindrome (6686446866).

The spelling of 2026400664 in words is "two billion, twenty-six million, four hundred thousand, six hundred sixty-four".