66505104 has 40 divisors (see below), whose sum is σ = 190895520. Its totient is φ = 22168224.

The previous prime is 66505099. The next prime is 66505147. The reversal of 66505104 is 40150566.

It is a happy number.

66505104 is a `hidden beast` number, since 6 + 650 + 5 + 1 + 0 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 76542 + ... + 77405.

It is an arithmetic number, because the mean of its divisors is an integer number (4772388).

Almost surely, 2^66505104 is an apocalyptic number.

It is an amenable number.

66505104 is an abundant number, since it is smaller than the sum of its proper divisors (124390416).

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

66505104 is a wasteful number, since it uses less digits than its factorization.

66505104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153964 (or 153952 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 66505104 is about 8155.0661554643. The cubic root of 66505104 is about 405.1523158225.

The spelling of 66505104 in words is "sixty-six million, five hundred five thousand, one hundred four".