1279496666 has 32 divisors (see below), whose sum is σ = 2274075648. Its totient is φ = 528347520.

The previous prime is 1279496633. The next prime is 1279496671. The reversal of 1279496666 is 6666949721.

It is a happy number.

It is a super-2 number, since 2×1279496666² = 3274223436610231112, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94796 + ... + 107448.

It is an arithmetic number, because the mean of its divisors is an integer number (71064864).

Almost surely, 2^1279496666 is an apocalyptic number.

1279496666 is a deficient number, since it is larger than the sum of its proper divisors (994578982).

1279496666 is a wasteful number, since it uses less digits than its factorization.

1279496666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12926.

The product of its digits is 5878656, while the sum is 56.

The square root of 1279496666 is about 35770.0526418399. The cubic root of 1279496666 is about 1085.6247093671.

The spelling of 1279496666 in words is "one billion, two hundred seventy-nine million, four hundred ninety-six thousand, six hundred sixty-six".