66238116 has 24 divisors (see below), whose sum is σ = 176635200. Its totient is φ = 18925152.

The previous prime is 66238093. The next prime is 66238153. The reversal of 66238116 is 61183266.

It is a super-2 number, since 2×66238116² = 8774976022458912, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 394191 + ... + 394358.

It is an arithmetic number, because the mean of its divisors is an integer number (7359800).

Almost surely, 2^66238116 is an apocalyptic number.

It is an amenable number.

66238116 is an abundant number, since it is smaller than the sum of its proper divisors (110397084).

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

66238116 is a wasteful number, since it uses less digits than its factorization.

66238116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 788563 (or 788561 counting only the distinct ones).

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

The square root of 66238116 is about 8138.6802369917. The cubic root of 66238116 is about 404.6094207361.

The spelling of 66238116 in words is "sixty-six million, two hundred thirty-eight thousand, one hundred sixteen".