1266651672 has 64 divisors (see below), whose sum is σ = 3720245760. Its totient is φ = 354307200.

The previous prime is 1266651637. The next prime is 1266651703. The reversal of 1266651672 is 2761566621.

1266651672 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 181104 + ... + 187967.

It is an arithmetic number, because the mean of its divisors is an integer number (58128840).

Almost surely, 2^1266651672 is an apocalyptic number.

1266651672 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1266651672 is an abundant number, since it is smaller than the sum of its proper divisors (2453594088).

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

1266651672 is a wasteful number, since it uses less digits than its factorization.

1266651672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369104 (or 369100 counting only the distinct ones).

The product of its digits is 181440, while the sum is 42.

The square root of 1266651672 is about 35590.0501826002. The cubic root of 1266651672 is about 1081.9795860360.

The spelling of 1266651672 in words is "one billion, two hundred sixty-six million, six hundred fifty-one thousand, six hundred seventy-two".