11700621661 has 8 divisors (see below), whose sum is σ = 11738107584. Its totient is φ = 11663160960.

The previous prime is 11700621649. The next prime is 11700621689. The reversal of 11700621661 is 16612600711.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11700621661 - 2³¹ = 9553138013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11700621601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1417416 + ... + 1425646.

It is an arithmetic number, because the mean of its divisors is an integer number (1467263448).

Almost surely, 2^11700621661 is an apocalyptic number.

It is an amenable number.

11700621661 is a deficient number, since it is larger than the sum of its proper divisors (37485923).

11700621661 is an equidigital number, since it uses as much as digits as its factorization.

11700621661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12611.

The product of its (nonzero) digits is 3024, while the sum is 31.

The spelling of 11700621661 in words is "eleven billion, seven hundred million, six hundred twenty-one thousand, six hundred sixty-one".