66466617 has 64 divisors (see below), whose sum is σ = 116121600. Its totient is φ = 32901120.

The previous prime is 66466607. The next prime is 66466643. The reversal of 66466617 is 71666466.

It is not a de Polignac number, because 66466617 - 2⁶ = 66466553 is a prime.

It is a super-2 number, since 2×66466617² = 8835622350849378, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66466607) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 277984 + ... + 278222.

It is an arithmetic number, because the mean of its divisors is an integer number (1814400).

Almost surely, 2^66466617 is an apocalyptic number.

It is an amenable number.

66466617 is a deficient number, since it is larger than the sum of its proper divisors (49654983).

66466617 is a wasteful number, since it uses less digits than its factorization.

66466617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326.

The product of its digits is 217728, while the sum is 42.

The square root of 66466617 is about 8152.7061151497. The cubic root of 66466617 is about 405.0741458517.

The spelling of 66466617 in words is "sixty-six million, four hundred sixty-six thousand, six hundred seventeen".