664665140161451 has 32 divisors (see below), whose sum is σ = 782672761382400. Its totient is φ = 556471140825600.

The previous prime is 664665140161441. The next prime is 664665140161457. The reversal of 664665140161451 is 154161041566466.

664665140161451 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-664665140161451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (664665140161457) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 130527056 + ... + 135523586.

It is an arithmetic number, because the mean of its divisors is an integer number (24458523793200).

Almost surely, 2^{664665140161451} is an apocalyptic number.

664665140161451 is a deficient number, since it is larger than the sum of its proper divisors (118007621220949).

664665140161451 is a wasteful number, since it uses less digits than its factorization.

664665140161451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4998707.

The product of its (nonzero) digits is 12441600, while the sum is 56.

The spelling of 664665140161451 in words is "six hundred sixty-four trillion, six hundred sixty-five billion, one hundred forty million, one hundred sixty-one thousand, four hundred fifty-one".