1266662051 has 4 divisors (see below), whose sum is σ = 1296119352. Its totient is φ = 1237204752.

The previous prime is 1266662009. The next prime is 1266662069. The reversal of 1266662051 is 1502666621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1502666621 = 4549 ⋅330329.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1266662051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1266662251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14728586 + ... + 14728671.

It is an arithmetic number, because the mean of its divisors is an integer number (324029838).

Almost surely, 2^1266662051 is an apocalyptic number.

1266662051 is a deficient number, since it is larger than the sum of its proper divisors (29457301).

1266662051 is an equidigital number, since it uses as much as digits as its factorization.

1266662051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29457300.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 1266662051 is about 35590.1959955266. The cubic root of 1266662051 is about 1081.9825412909.

The spelling of 1266662051 in words is "one billion, two hundred sixty-six million, six hundred sixty-two thousand, fifty-one".