1266660546 has 16 divisors (see below), whose sum is σ = 2592236064. Its totient is φ = 412401024.

The previous prime is 1266660541. The next prime is 1266660583. The reversal of 1266660546 is 6450666621.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1266660498 and 1266660507.

It is not an unprimeable number, because it can be changed into a prime (1266660541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2454511 + ... + 2455026.

It is an arithmetic number, because the mean of its divisors is an integer number (162014754).

Almost surely, 2^1266660546 is an apocalyptic number.

1266660546 is an abundant number, since it is smaller than the sum of its proper divisors (1325575518).

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

1266660546 is a wasteful number, since it uses less digits than its factorization.

1266660546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4909585.

The product of its (nonzero) digits is 311040, while the sum is 42.

The square root of 1266660546 is about 35590.1748520571. The cubic root of 1266660546 is about 1081.9821127671.

The spelling of 1266660546 in words is "one billion, two hundred sixty-six million, six hundred sixty thousand, five hundred forty-six".