11667799621 has 8 divisors (see below), whose sum is σ = 11843913600. Its totient is φ = 11491743648.

The previous prime is 11667799613. The next prime is 11667799643. The reversal of 11667799621 is 12699776611.

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 11667799621 - 2³ = 11667799613 is a prime.

It is a super-2 number, since 2×11667799621² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11667709621) 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, 561780 + ... + 582178.

It is an arithmetic number, because the mean of its divisors is an integer number (1480489200).

Almost surely, 2^11667799621 is an apocalyptic number.

It is an amenable number.

11667799621 is a deficient number, since it is larger than the sum of its proper divisors (176113979).

11667799621 is an equidigital number, since it uses as much as digits as its factorization.

11667799621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29003.

The product of its digits is 1714608, while the sum is 55.

The spelling of 11667799621 in words is "eleven billion, six hundred sixty-seven million, seven hundred ninety-nine thousand, six hundred twenty-one".