11666623510 has 8 divisors (see below), whose sum is σ = 20999922336. Its totient is φ = 4666649400.

The previous prime is 11666623489. The next prime is 11666623531. The reversal of 11666623510 is 1532666611.

It is an interprime number because it is at equal distance from previous prime (11666623489) and next prime (11666623531).

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

It is a super-2 number, since 2×11666623510² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11666623510.

It is a congruent 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, 583331166 + ... + 583331185.

It is an arithmetic number, because the mean of its divisors is an integer number (2624990292).

Almost surely, 2^11666623510 is an apocalyptic number.

11666623510 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11666623510 is a deficient number, since it is larger than the sum of its proper divisors (9333298826).

11666623510 is a wasteful number, since it uses less digits than its factorization.

11666623510 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1166662358.

The product of its (nonzero) digits is 38880, while the sum is 37.

The spelling of 11666623510 in words is "eleven billion, six hundred sixty-six million, six hundred twenty-three thousand, five hundred ten".