66745206 has 24 divisors (see below), whose sum is σ = 157761864. Its totient is φ = 20225760.

The previous prime is 66745193. The next prime is 66745207. The reversal of 66745206 is 60254766.

66745206 is a `hidden beast` number, since 66 + 74 + 520 + 6 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66745207) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 168351 + ... + 168746.

It is an arithmetic number, because the mean of its divisors is an integer number (6573411).

Almost surely, 2^66745206 is an apocalyptic number.

66745206 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

66745206 is an abundant number, since it is smaller than the sum of its proper divisors (91016658).

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

66745206 is a wasteful number, since it uses less digits than its factorization.

66745206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337116 (or 337113 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The square root of 66745206 is about 8169.7739258807. The cubic root of 66745206 is about 405.6393012464.

The spelling of 66745206 in words is "sixty-six million, seven hundred forty-five thousand, two hundred six".