66120386 has 8 divisors (see below), whose sum is σ = 99729084. Its totient is φ = 32877360.

The previous prime is 66120371. The next prime is 66120419. The reversal of 66120386 is 68302166.

It can be written as a sum of positive squares in 2 ways, for example, as 66113161 + 7225 = 8131^2 + 85^2 .

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

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, 90965 + ... + 91688.

Almost surely, 2^66120386 is an apocalyptic number.

66120386 is a deficient number, since it is larger than the sum of its proper divisors (33608698).

66120386 is a wasteful number, since it uses less digits than its factorization.

66120386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182836.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 66120386 is about 8131.4442751580. Note that the first 3 decimals coincide. The cubic root of 66120386 is about 404.3695642937.

The spelling of 66120386 in words is "sixty-six million, one hundred twenty thousand, three hundred eighty-six".