2471666 has 4 divisors (see below), whose sum is σ = 3707502. Its totient is φ = 1235832.

The previous prime is 2471663. The next prime is 2471669. The reversal of 2471666 is 6661742.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (2471663) and next prime (2471669).

It can be written as a sum of positive squares in only one way, i.e., 1901641 + 570025 = 1379^2 + 755^2 .

It is a super-2 number, since 2×2471666² = 12218265631112, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2471663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 617915 + ... + 617918.

2^2471666 is an apocalyptic number.

2471666 is a deficient number, since it is larger than the sum of its proper divisors (1235836).

2471666 is a wasteful number, since it uses less digits than its factorization.

2471666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1235835.

The product of its digits is 12096, while the sum is 32.

The square root of 2471666 is about 1572.1533004132. The cubic root of 2471666 is about 135.2061961027.

The spelling of 2471666 in words is "two million, four hundred seventy-one thousand, six hundred sixty-six".