1266780349 has 8 divisors (see below), whose sum is σ = 1320469920. Its totient is φ = 1213758000.

The previous prime is 1266780341. The next prime is 1266780353. The reversal of 1266780349 is 9430876621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1266780349 - 2³ = 1266780341 is a prime.

It is a super-2 number, since 2×1266780349² = 3209464905225123602, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1266780299 and 1266780308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1266780341) 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, 162927 + ... + 170524.

It is an arithmetic number, because the mean of its divisors is an integer number (165058740).

Almost surely, 2^1266780349 is an apocalyptic number.

It is an amenable number.

1266780349 is a deficient number, since it is larger than the sum of its proper divisors (53689571).

1266780349 is a wasteful number, since it uses less digits than its factorization.

1266780349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333611.

The product of its (nonzero) digits is 435456, while the sum is 46.

The square root of 1266780349 is about 35591.8579031778. The cubic root of 1266780349 is about 1082.0162236205.

The spelling of 1266780349 in words is "one billion, two hundred sixty-six million, seven hundred eighty thousand, three hundred forty-nine".