66056655 has 64 divisors (see below), whose sum is σ = 126950400. Its totient is φ = 29296512.

The previous prime is 66056647. The next prime is 66056659. The reversal of 66056655 is 55665066.

It is a happy number.

It is not a de Polignac number, because 66056655 - 2³ = 66056647 is a prime.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66056659) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 190192 + ... + 190538.

It is an arithmetic number, because the mean of its divisors is an integer number (1983600).

Almost surely, 2^66056655 is an apocalyptic number.

66056655 is a deficient number, since it is larger than the sum of its proper divisors (60893745).

66056655 is a wasteful number, since it uses less digits than its factorization.

66056655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413 (or 399 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 39.

The square root of 66056655 is about 8127.5245308765. The cubic root of 66056655 is about 404.2396035631.

The spelling of 66056655 in words is "sixty-six million, fifty-six thousand, six hundred fifty-five".