66320067 has 32 divisors (see below), whose sum is σ = 100362240. Its totient is φ = 38592000.

The previous prime is 66320057. The next prime is 66320101. The reversal of 66320067 is 76002366.

It is not a de Polignac number, because 66320067 - 2⁸ = 66319811 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66320027) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 246409 + ... + 246677.

It is an arithmetic number, because the mean of its divisors is an integer number (3136320).

Almost surely, 2^66320067 is an apocalyptic number.

66320067 is a deficient number, since it is larger than the sum of its proper divisors (34042173).

66320067 is a wasteful number, since it uses less digits than its factorization.

66320067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555.

The product of its (nonzero) digits is 9072, while the sum is 30.

The square root of 66320067 is about 8143.7133422045. The cubic root of 66320067 is about 404.7762153422.

The spelling of 66320067 in words is "sixty-six million, three hundred twenty thousand, sixty-seven".