664077143 has 4 divisors (see below), whose sum is σ = 664197048. Its totient is φ = 663957240.

The previous prime is 664077109. The next prime is 664077173. The reversal of 664077143 is 341770466.

664077143 is digitally balanced in base 2, 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 a de Polignac number, because none of the positive numbers 2^k-664077143 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 664077097 and 664077106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664077173) 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, 51221 + ... + 62862.

It is an arithmetic number, because the mean of its divisors is an integer number (166049262).

Almost surely, 2^664077143 is an apocalyptic number.

664077143 is a deficient number, since it is larger than the sum of its proper divisors (119905).

664077143 is a wasteful number, since it uses less digits than its factorization.

664077143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119904.

The product of its (nonzero) digits is 84672, while the sum is 38.

The square root of 664077143 is about 25769.6942744768. The cubic root of 664077143 is about 872.4479184463.

The spelling of 664077143 in words is "six hundred sixty-four million, seventy-seven thousand, one hundred forty-three".