2660626 has 4 divisors (see below), whose sum is σ = 3990942. Its totient is φ = 1330312.

The previous prime is 2660621. The next prime is 2660639. The reversal of 2660626 is 6260662.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6260662 = 2 ⋅3130331.

It can be written as a sum of positive squares in only one way, i.e., 2405601 + 255025 = 1551^2 + 505^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2660594 and 2660603.

It is not an unprimeable number, because it can be changed into a prime (2660621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665155 + ... + 665158.

2^2660626 is an apocalyptic number.

2660626 is a deficient number, since it is larger than the sum of its proper divisors (1330316).

2660626 is a wasteful number, since it uses less digits than its factorization.

2660626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1330315.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 2660626 is about 1631.1425443535. The cubic root of 2660626 is about 138.5674665979.

The spelling of 2660626 in words is "two million, six hundred sixty thousand, six hundred twenty-six".