11661306477 has 4 divisors (see below), whose sum is σ = 15548408640. Its totient is φ = 7774204316.

The previous prime is 11661306457. The next prime is 11661306479. The reversal of 11661306477 is 77460316611.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11661306477 - 2⁶ = 11661306413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11661306479) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1943551077 + ... + 1943551082.

It is an arithmetic number, because the mean of its divisors is an integer number (3887102160).

Almost surely, 2^11661306477 is an apocalyptic number.

It is an amenable number.

11661306477 is a deficient number, since it is larger than the sum of its proper divisors (3887102163).

11661306477 is an equidigital number, since it uses as much as digits as its factorization.

11661306477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3887102162.

The product of its (nonzero) digits is 127008, while the sum is 42.

The spelling of 11661306477 in words is "eleven billion, six hundred sixty-one million, three hundred six thousand, four hundred seventy-seven".