66250085 has 16 divisors (see below), whose sum is σ = 87177600. Its totient is φ = 47931840.

The previous prime is 66250081. The next prime is 66250099. The reversal of 66250085 is 58005266.

It is a happy number.

It is not a de Polignac number, because 66250085 - 2² = 66250081 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66250081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7919 + ... + 13971.

It is an arithmetic number, because the mean of its divisors is an integer number (5448600).

Almost surely, 2^66250085 is an apocalyptic number.

It is an amenable number.

66250085 is a deficient number, since it is larger than the sum of its proper divisors (20927515).

66250085 is a wasteful number, since it uses less digits than its factorization.

66250085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6268.

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 66250085 is about 8139.4155195567. The cubic root of 66250085 is about 404.6337897791.

The spelling of 66250085 in words is "sixty-six million, two hundred fifty thousand, eighty-five".