2499664 has 10 divisors (see below), whose sum is σ = 4843130. Its totient is φ = 1249824.

The previous prime is 2499661. The next prime is 2499667. The reversal of 2499664 is 4669942.

It is an interprime number because it is at equal distance from previous prime (2499661) and next prime (2499667).

It can be written as a sum of positive squares in only one way, i.e., 1459264 + 1040400 = 1208^2 + 1020^2 .

It is a super-2 number, since 2×2499664² = 12496640225792, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2499661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78099 + ... + 78130.

It is an arithmetic number, because the mean of its divisors is an integer number (484313).

2^2499664 is an apocalyptic number.

It is an amenable number.

2499664 is a deficient number, since it is larger than the sum of its proper divisors (2343466).

2499664 is a wasteful number, since it uses less digits than its factorization.

2499664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156237 (or 156231 counting only the distinct ones).

The product of its digits is 93312, while the sum is 40.

The square root of 2499664 is about 1581.0325739845. The cubic root of 2499664 is about 135.7148002619.

The spelling of 2499664 in words is "two million, four hundred ninety-nine thousand, six hundred sixty-four".