664957111 has 16 divisors (see below), whose sum is σ = 830631424. Its totient is φ = 518262624.

The previous prime is 664957067. The next prime is 664957121. The reversal of 664957111 is 111759466.

It is a cyclic number.

It is not a de Polignac number, because 664957111 - 2⁹ = 664956599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664957121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48435 + ... + 60628.

It is an arithmetic number, because the mean of its divisors is an integer number (51914464).

Almost surely, 2^664957111 is an apocalyptic number.

664957111 is a deficient number, since it is larger than the sum of its proper divisors (165674313).

664957111 is a wasteful number, since it uses less digits than its factorization.

664957111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109150.

The product of its digits is 45360, while the sum is 40.

The square root of 664957111 is about 25786.7623210049. The cubic root of 664957111 is about 872.8331083312.

The spelling of 664957111 in words is "six hundred sixty-four million, nine hundred fifty-seven thousand, one hundred eleven".