2642666 has 8 divisors (see below), whose sum is σ = 4268964. Its totient is φ = 1219680.

The previous prime is 2642639. The next prime is 2642693. The reversal of 2642666 is 6662462.

It is an interprime number because it is at equal distance from previous prime (2642639) and next prime (2642693).

It can be written as a sum of positive squares in 2 ways, for example, as 2042041 + 600625 = 1429^2 + 775^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50795 + ... + 50846.

2^2642666 is an apocalyptic number.

2642666 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

2642666 is a deficient number, since it is larger than the sum of its proper divisors (1626298).

2642666 is a wasteful number, since it uses less digits than its factorization.

2642666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101656.

The product of its digits is 20736, while the sum is 32.

The square root of 2642666 is about 1625.6278786980. The cubic root of 2642666 is about 138.2549721514.

The spelling of 2642666 in words is "two million, six hundred forty-two thousand, six hundred sixty-six".