6664731 has 8 divisors (see below), whose sum is σ = 9409104. Its totient is φ = 4181760.

The previous prime is 6664729. The next prime is 6664739. The reversal of 6664731 is 1374666.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6664731 - 2¹ = 6664729 is a prime.

It is a super-2 number, since 2×6664731² = 88837278604722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6664692 and 6664701.

It is not an unprimeable number, because it can be changed into a prime (6664739) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65290 + ... + 65391.

It is an arithmetic number, because the mean of its divisors is an integer number (1176138).

Almost surely, 2^6664731 is an apocalyptic number.

6664731 is a deficient number, since it is larger than the sum of its proper divisors (2744373).

6664731 is a wasteful number, since it uses less digits than its factorization.

6664731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130701.

The product of its digits is 18144, while the sum is 33.

The square root of 6664731 is about 2581.6140300208. The cubic root of 6664731 is about 188.1889886922.

The spelling of 6664731 in words is "six million, six hundred sixty-four thousand, seven hundred thirty-one".