66775086 has 24 divisors (see below), whose sum is σ = 165348144. Its totient is φ = 19078560.

The previous prime is 66775073. The next prime is 66775103. The reversal of 66775086 is 68057766.

It is a super-2 number, since 2×66775086² = 8917824220614792, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 264855 + ... + 265106.

It is an arithmetic number, because the mean of its divisors is an integer number (6889506).

Almost surely, 2^66775086 is an apocalyptic number.

66775086 is an abundant number, since it is smaller than the sum of its proper divisors (98573058).

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

66775086 is a wasteful number, since it uses less digits than its factorization.

66775086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529976 (or 529973 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 45.

The square root of 66775086 is about 8171.6024132357. The cubic root of 66775086 is about 405.6998234163.

The spelling of 66775086 in words is "sixty-six million, seven hundred seventy-five thousand, eighty-six".