1266626445 has 64 divisors (see below), whose sum is σ = 2428268544. Its totient is φ = 551232000.

The previous prime is 1266626423. The next prime is 1266626461. The reversal of 1266626445 is 5446266621.

It is not a de Polignac number, because 1266626445 - 2¹¹ = 1266624397 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1266626397 and 1266626406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 561570 + ... + 563820.

It is an arithmetic number, because the mean of its divisors is an integer number (37941696).

Almost surely, 2^1266626445 is an apocalyptic number.

1266626445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1266626445 is a deficient number, since it is larger than the sum of its proper divisors (1161642099).

1266626445 is a wasteful number, since it uses less digits than its factorization.

1266626445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2522.

The product of its digits is 414720, while the sum is 42.

The square root of 1266626445 is about 35589.6957699838. The cubic root of 1266626445 is about 1081.9724029825.

The spelling of 1266626445 in words is "one billion, two hundred sixty-six million, six hundred twenty-six thousand, four hundred forty-five".