666460044 has 36 divisors (see below), whose sum is σ = 1783762344. Its totient is φ = 209085312.

The previous prime is 666460033. The next prime is 666460063. The reversal of 666460044 is 440064666.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 666459990 and 666460008.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 543882 + ... + 545105.

It is an arithmetic number, because the mean of its divisors is an integer number (49548954).

Almost surely, 2^666460044 is an apocalyptic number.

It is an amenable number.

666460044 is an abundant number, since it is smaller than the sum of its proper divisors (1117302300).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

666460044 is a wasteful number, since it uses less digits than its factorization.

666460044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1089014 (or 1089009 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 36.

The square root of 666460044 is about 25815.8874339040. The cubic root of 666460044 is about 873.4902046482.

The spelling of 666460044 in words is "six hundred sixty-six million, four hundred sixty thousand, forty-four".