2666650 has 48 divisors (see below), whose sum is σ = 5981760. Its totient is φ = 864000.

The previous prime is 2666647. The next prime is 2666659. The reversal of 2666650 is 566662.

2666650 = 295² + 296² + ... + 322².

It is a super-2 number, since 2×2666650² = 14222044445000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2666659) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6450 + ... + 6850.

It is an arithmetic number, because the mean of its divisors is an integer number (124620).

2^2666650 is an apocalyptic number.

2666650 is an abundant number, since it is smaller than the sum of its proper divisors (3315110).

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

2666650 is a wasteful number, since it uses less digits than its factorization.

2666650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439 (or 434 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 2666650 is about 1632.9880587438. The cubic root of 2666650 is about 138.6719659690.

It can be divided in two parts, 266 and 6650, that multiplied together give a square (1768900 = 1330²).

The spelling of 2666650 in words is "two million, six hundred sixty-six thousand, six hundred fifty".