11661401346 has 64 divisors (see below), whose sum is σ = 26934847488. Its totient is φ = 3296901888.

The previous prime is 11661401341. The next prime is 11661401357. The reversal of 11661401346 is 64310416611.

It is a super-2 number, since 2×11661401346² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11661401341) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3524625 + ... + 3527931.

It is an arithmetic number, because the mean of its divisors is an integer number (420856992).

Almost surely, 2^11661401346 is an apocalyptic number.

11661401346 is an abundant number, since it is smaller than the sum of its proper divisors (15273446142).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11661401346 is a wasteful number, since it uses less digits than its factorization.

11661401346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4175.

The product of its (nonzero) digits is 10368, while the sum is 33.

Adding to 11661401346 its reverse (64310416611), we get a palindrome (75971817957).

The spelling of 11661401346 in words is "eleven billion, six hundred sixty-one million, four hundred one thousand, three hundred forty-six".