1072656666 has 24 divisors (see below), whose sum is σ = 2446410720. Its totient is φ = 338733576.

The previous prime is 1072656661. The next prime is 1072656679. The reversal of 1072656666 is 6666562701.

It is a super-2 number, since 2×1072656666² = 2301184646228471112, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1072656661) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1567870 + ... + 1568553.

It is an arithmetic number, because the mean of its divisors is an integer number (101933780).

Almost surely, 2^1072656666 is an apocalyptic number.

1072656666 is an abundant number, since it is smaller than the sum of its proper divisors (1373754054).

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

1072656666 is a wasteful number, since it uses less digits than its factorization.

1072656666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3136450 (or 3136447 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 45.

The square root of 1072656666 is about 32751.4376173016. The cubic root of 1072656666 is about 1023.6549212867.

The spelling of 1072656666 in words is "one billion, seventy-two million, six hundred fifty-six thousand, six hundred sixty-six".