66652565 has 16 divisors (see below), whose sum is σ = 92910720. Its totient is φ = 44953920.

The previous prime is 66652561. The next prime is 66652583. The reversal of 66652565 is 56525666.

It is not a de Polignac number, because 66652565 - 2² = 66652561 is a prime.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 13475 + ... + 17744.

It is an arithmetic number, because the mean of its divisors is an integer number (5806920).

Almost surely, 2^66652565 is an apocalyptic number.

It is an amenable number.

66652565 is a deficient number, since it is larger than the sum of its proper divisors (26258155).

66652565 is a wasteful number, since it uses less digits than its factorization.

66652565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31292.

The product of its digits is 324000, while the sum is 41.

The square root of 66652565 is about 8164.1022164106. The cubic root of 66652565 is about 405.4515412938.

The spelling of 66652565 in words is "sixty-six million, six hundred fifty-two thousand, five hundred sixty-five".