2666694 has 8 divisors (see below), whose sum is σ = 5333400. Its totient is φ = 888896.

The previous prime is 2666693. The next prime is 2666717. The reversal of 2666694 is 4966662.

2666694 = 815² + 816² + ... + 818².

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

2666694 is an admirable number.

It is a super-2 number, since 2×2666694² = 14222513779272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2666693) 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, 222219 + ... + 222230.

It is an arithmetic number, because the mean of its divisors is an integer number (666675).

2^2666694 is an apocalyptic number.

2666694 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2666694 is a wasteful number, since it uses less digits than its factorization.

2666694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444454.

The product of its digits is 93312, while the sum is 39.

The square root of 2666694 is about 1633.0015309240. The cubic root of 2666694 is about 138.6727286654.

Subtracting 2666694 from its reverse (4966662), we obtain a cube (2299968 = 132³).

The spelling of 2666694 in words is "two million, six hundred sixty-six thousand, six hundred ninety-four".