66610652 has 6 divisors (see below), whose sum is σ = 116568648. Its totient is φ = 33305324.

The previous prime is 66610639. The next prime is 66610657. The reversal of 66610652 is 25601666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66610657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8326328 + ... + 8326335.

It is an arithmetic number, because the mean of its divisors is an integer number (19428108).

Almost surely, 2^66610652 is an apocalyptic number.

It is an amenable number.

66610652 is a deficient number, since it is larger than the sum of its proper divisors (49957996).

66610652 is a wasteful number, since it uses less digits than its factorization.

66610652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16652667 (or 16652665 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 66610652 is about 8161.5349046610. The cubic root of 66610652 is about 405.3665370446.

The spelling of 66610652 in words is "sixty-six million, six hundred ten thousand, six hundred fifty-two".