66652563 has 8 divisors (see below), whose sum is σ = 94097808. Its totient is φ = 41821184.

The previous prime is 66652561. The next prime is 66652583. The reversal of 66652563 is 36525666.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66652563 - 2¹ = 66652561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66652561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 653406 + ... + 653507.

It is an arithmetic number, because the mean of its divisors is an integer number (11762226).

Almost surely, 2^66652563 is an apocalyptic number.

66652563 is a deficient number, since it is larger than the sum of its proper divisors (27445245).

66652563 is a wasteful number, since it uses less digits than its factorization.

66652563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1306933.

The product of its digits is 194400, while the sum is 39.

The square root of 66652563 is about 8164.1020939231. The cubic root of 66652563 is about 405.4515372384.

The spelling of 66652563 in words is "sixty-six million, six hundred fifty-two thousand, five hundred sixty-three".