66250907 has 4 divisors (see below), whose sum is σ = 66467016. Its totient is φ = 66034800.

The previous prime is 66250897. The next prime is 66250949. The reversal of 66250907 is 70905266.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66250907 - 2²⁴ = 49473691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66250997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107594 + ... + 108207.

It is an arithmetic number, because the mean of its divisors is an integer number (16616754).

Almost surely, 2^66250907 is an apocalyptic number.

66250907 is a deficient number, since it is larger than the sum of its proper divisors (216109).

66250907 is a wasteful number, since it uses less digits than its factorization.

66250907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216108.

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 66250907 is about 8139.4660144263. The cubic root of 66250907 is about 404.6354632743.

The spelling of 66250907 in words is "sixty-six million, two hundred fifty thousand, nine hundred seven".