66740067 has 12 divisors (see below), whose sum is σ = 96650320. Its totient is φ = 44378928.

The previous prime is 66740059. The next prime is 66740077. The reversal of 66740067 is 76004766.

It is not a de Polignac number, because 66740067 - 2³ = 66740059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66740057) 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, 5767 + ... + 12912.

Almost surely, 2^66740067 is an apocalyptic number.

66740067 is a deficient number, since it is larger than the sum of its proper divisors (29910253).

66740067 is a wasteful number, since it uses less digits than its factorization.

66740067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19082 (or 19079 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 36.

The square root of 66740067 is about 8169.4594068396. The cubic root of 66740067 is about 405.6288903420.

The spelling of 66740067 in words is "sixty-six million, seven hundred forty thousand, sixty-seven".