814664 has 8 divisors (see below), whose sum is σ = 1527510. Its totient is φ = 407328.

The previous prime is 814643. The next prime is 814687. The reversal of 814664 is 466418.

It can be written as a sum of positive squares in only one way, i.e., 574564 + 240100 = 758^2 + 490^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a plaindrome in base 15.

It is an unprimeable number.

814664 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50909 + ... + 50924.

2⁸¹⁴⁶⁶⁴ is an apocalyptic number.

It is an amenable number.

814664 is a deficient number, since it is larger than the sum of its proper divisors (712846).

814664 is a wasteful number, since it uses less digits than its factorization.

814664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101839 (or 101835 counting only the distinct ones).

The product of its digits is 4608, while the sum is 29.

The square root of 814664 is about 902.5873918907. The cubic root of 814664 is about 93.3955480884.

The spelling of 814664 in words is "eight hundred fourteen thousand, six hundred sixty-four".