11665898 has 8 divisors (see below), whose sum is σ = 17591040. Its totient is φ = 5802220.

The previous prime is 11665879. The next prime is 11665903. The reversal of 11665898 is 89856611.

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

It is a super-2 number, since 2×11665898² = 272186352292808, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14888 + ... + 15651.

It is an arithmetic number, because the mean of its divisors is an integer number (2198880).

Almost surely, 2^11665898 is an apocalyptic number.

11665898 is a deficient number, since it is larger than the sum of its proper divisors (5925142).

11665898 is a wasteful number, since it uses less digits than its factorization.

11665898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30732.

The product of its digits is 103680, while the sum is 44.

The square root of 11665898 is about 3415.5377321880. The cubic root of 11665898 is about 226.7980893949.

It can be divided in two parts, 11 and 665898, that multiplied together give a triangular number (7324878 = T₃₈₂₇).

The spelling of 11665898 in words is "eleven million, six hundred sixty-five thousand, eight hundred ninety-eight".