66250055 has 32 divisors (see below), whose sum is σ = 87272640. Its totient is φ = 48107520.

The previous prime is 66250027. The next prime is 66250073. The reversal of 66250055 is 55005266.

It is a de Polignac number, because none of the positive numbers 2^k-66250055 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 284219 + ... + 284451.

It is an arithmetic number, because the mean of its divisors is an integer number (2727270).

Almost surely, 2^66250055 is an apocalyptic number.

66250055 is a deficient number, since it is larger than the sum of its proper divisors (21022585).

66250055 is a wasteful number, since it uses less digits than its factorization.

66250055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371.

The product of its (nonzero) digits is 9000, while the sum is 29.

The square root of 66250055 is about 8139.4136766723. The cubic root of 66250055 is about 404.6337287024.

The spelling of 66250055 in words is "sixty-six million, two hundred fifty thousand, fifty-five".