66650652 has 18 divisors (see below), whose sum is σ = 168478128. Its totient is φ = 22216872.

The previous prime is 66650629. The next prime is 66650681. The reversal of 66650652 is 25605666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 1851407 = 66650652 / (6 + 6 + 6 + 5 + 0 + 6 + 5 + 2).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 925668 + ... + 925739.

It is an arithmetic number, because the mean of its divisors is an integer number (9359896).

Almost surely, 2^66650652 is an apocalyptic number.

It is an amenable number.

66650652 is an abundant number, since it is smaller than the sum of its proper divisors (101827476).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66650652 is a wasteful number, since it uses less digits than its factorization.

66650652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1851417 (or 1851412 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 66650652 is about 8163.9850563313. The cubic root of 66650652 is about 405.4476622922.

The spelling of 66650652 in words is "sixty-six million, six hundred fifty thousand, six hundred fifty-two".