2664658 has 4 divisors (see below), whose sum is σ = 3996990. Its totient is φ = 1332328.

The previous prime is 2664647. The next prime is 2664661. The reversal of 2664658 is 8564662.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8564662 = 2 ⋅4282331.

It can be written as a sum of positive squares in only one way, i.e., 2331729 + 332929 = 1527^2 + 577^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 666163 + ... + 666166.

2^2664658 is an apocalyptic number.

2664658 is a deficient number, since it is larger than the sum of its proper divisors (1332332).

2664658 is a wasteful number, since it uses less digits than its factorization.

2664658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1332331.

The product of its digits is 69120, while the sum is 37.

The square root of 2664658 is about 1632.3780199451. The cubic root of 2664658 is about 138.6374278322.

The spelling of 2664658 in words is "two million, six hundred sixty-four thousand, six hundred fifty-eight".