2666456356451 has 4 divisors (see below), whose sum is σ = 2666491088352. Its totient is φ = 2666421624552.

The previous prime is 2666456356441. The next prime is 2666456356483. The reversal of 2666456356451 is 1546536546662.

It is a happy number.

2666456356451 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 2666456356451 - 2⁶ = 2666456356387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2666456356441) 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, 17250536 + ... + 17404421.

It is an arithmetic number, because the mean of its divisors is an integer number (666622772088).

Almost surely, 2^{2666456356451} is an apocalyptic number.

2666456356451 is a deficient number, since it is larger than the sum of its proper divisors (34731901).

2666456356451 is an equidigital number, since it uses as much as digits as its factorization.

2666456356451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34731900.

The product of its digits is 93312000, while the sum is 59.

The spelling of 2666456356451 in words is "two trillion, six hundred sixty-six billion, four hundred fifty-six million, three hundred fifty-six thousand, four hundred fifty-one".