6662731 has 4 divisors (see below), whose sum is σ = 6667912. Its totient is φ = 6657552.

The previous prime is 6662723. The next prime is 6662741. The reversal of 6662731 is 1372666.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1372666 = 2 ⋅686333.

It is a cyclic number.

It is not a de Polignac number, because 6662731 - 2³ = 6662723 is a prime.

It is a super-2 number, since 2×6662731² = 88783968756722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6662693 and 6662702.

It is not an unprimeable number, because it can be changed into a prime (6662741) 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, 976 + ... + 3778.

It is an arithmetic number, because the mean of its divisors is an integer number (1666978).

Almost surely, 2^6662731 is an apocalyptic number.

6662731 is a deficient number, since it is larger than the sum of its proper divisors (5181).

6662731 is a wasteful number, since it uses less digits than its factorization.

6662731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5180.

The product of its digits is 9072, while the sum is 31.

The square root of 6662731 is about 2581.2266463835. The cubic root of 6662731 is about 188.1701624444.

The spelling of 6662731 in words is "six million, six hundred sixty-two thousand, seven hundred thirty-one".