66651066 has 32 divisors (see below), whose sum is σ = 148582080. Its totient is φ = 22146768.

The previous prime is 66651047. The next prime is 66651071. The reversal of 66651066 is 66015666.

It is a self number, because there is not a number n which added to its sum of digits gives 66651066.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16960 + ... + 20516.

It is an arithmetic number, because the mean of its divisors is an integer number (4643190).

Almost surely, 2^66651066 is an apocalyptic number.

66651066 is an abundant number, since it is smaller than the sum of its proper divisors (81931014).

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

66651066 is a wasteful number, since it uses less digits than its factorization.

66651066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3915 (or 3909 counting only the distinct ones).

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

The square root of 66651066 is about 8164.0104115563. The cubic root of 66651066 is about 405.4485017688.

The spelling of 66651066 in words is "sixty-six million, six hundred fifty-one thousand, sixty-six".