11667537771 has 8 divisors (see below), whose sum is σ = 15811745424. Its totient is φ = 7650844320.

The previous prime is 11667537737. The next prime is 11667537823. The reversal of 11667537771 is 17773576611.

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

It is not a de Polignac number, because 11667537771 - 2¹⁹ = 11667013483 is a prime.

It is a super-2 number, since 2×11667537771² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11667537671) 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, 31878336 + ... + 31878701.

It is an arithmetic number, because the mean of its divisors is an integer number (1976468178).

Almost surely, 2^11667537771 is an apocalyptic number.

11667537771 is a deficient number, since it is larger than the sum of its proper divisors (4144207653).

11667537771 is an equidigital number, since it uses as much as digits as its factorization.

11667537771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63757101.

The product of its digits is 1296540, while the sum is 51.

The spelling of 11667537771 in words is "eleven billion, six hundred sixty-seven million, five hundred thirty-seven thousand, seven hundred seventy-one".