2662991 has 4 divisors (see below), whose sum is σ = 2727984. Its totient is φ = 2598000.

The previous prime is 2662981. The next prime is 2663027. The reversal of 2662991 is 1992662.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2662991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2662901) 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, 32435 + ... + 32516.

It is an arithmetic number, because the mean of its divisors is an integer number (681996).

2^2662991 is an apocalyptic number.

2662991 is a deficient number, since it is larger than the sum of its proper divisors (64993).

2662991 is an equidigital number, since it uses as much as digits as its factorization.

2662991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64992.

The product of its digits is 11664, while the sum is 35.

The square root of 2662991 is about 1631.8673352941. The cubic root of 2662991 is about 138.6085114506.

The spelling of 2662991 in words is "two million, six hundred sixty-two thousand, nine hundred ninety-one".