64905066 has 12 divisors (see below), whose sum is σ = 140627682. Its totient is φ = 21635016.

The previous prime is 64905059. The next prime is 64905089. The reversal of 64905066 is 66050946.

It is a happy number.

64905066 is a `hidden beast` number, since 64 + 90 + 506 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 39955041 + 24950025 = 6321^2 + 4995^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 64905066.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1802901 + ... + 1802936.

Almost surely, 2^64905066 is an apocalyptic number.

64905066 is an abundant number, since it is smaller than the sum of its proper divisors (75722616).

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

64905066 is a wasteful number, since it uses less digits than its factorization.

64905066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3605845 (or 3605842 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 64905066 is about 8056.3680402524. The cubic root of 64905066 is about 401.8767350594.

The spelling of 64905066 in words is "sixty-four million, nine hundred five thousand, sixty-six".