11661477770 has 16 divisors (see below), whose sum is σ = 21014610408. Its totient is φ = 4659268800.

The previous prime is 11661477761. The next prime is 11661477827. The reversal of 11661477770 is 7777416611.

It can be written as a sum of positive squares in 4 ways, for example, as 11623642969 + 37834801 = 107813^2 + 6151^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 656081 + ... + 673620.

Almost surely, 2^11661477770 is an apocalyptic number.

11661477770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11661477770 is a deficient number, since it is larger than the sum of its proper divisors (9353132638).

11661477770 is a wasteful number, since it uses less digits than its factorization.

11661477770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1330585.

The product of its (nonzero) digits is 345744, while the sum is 47.

The spelling of 11661477770 in words is "eleven billion, six hundred sixty-one million, four hundred seventy-seven thousand, seven hundred seventy".