66652215 has 32 divisors (see below), whose sum is σ = 122259456. Its totient is φ = 30374400.

The previous prime is 66652211. The next prime is 66652219. The reversal of 66652215 is 51225666.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (66652211) and next prime (66652219).

It is not a de Polignac number, because 66652215 - 2² = 66652211 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66652211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41314 + ... + 42896.

It is an arithmetic number, because the mean of its divisors is an integer number (3820608).

Almost surely, 2^66652215 is an apocalyptic number.

66652215 is a deficient number, since it is larger than the sum of its proper divisors (55607241).

66652215 is a wasteful number, since it uses less digits than its factorization.

66652215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1999.

The product of its digits is 21600, while the sum is 33.

The square root of 66652215 is about 8164.0807810800. The cubic root of 66652215 is about 405.4508316022.

The spelling of 66652215 in words is "sixty-six million, six hundred fifty-two thousand, two hundred fifteen".