66389502 has 16 divisors (see below), whose sum is σ = 133998480. Its totient is φ = 21926592.

The previous prime is 66389501. The next prime is 66389503. The reversal of 66389502 is 20598366.

It is an interprime number because it is at equal distance from previous prime (66389501) and next prime (66389503).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66389501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50103 + ... + 51410.

It is an arithmetic number, because the mean of its divisors is an integer number (8374905).

Almost surely, 2^66389502 is an apocalyptic number.

66389502 is an abundant number, since it is smaller than the sum of its proper divisors (67608978).

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

66389502 is a wasteful number, since it uses less digits than its factorization.

66389502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101627.

The product of its (nonzero) digits is 77760, while the sum is 39.

The square root of 66389502 is about 8147.9753313323. The cubic root of 66389502 is about 404.9174286779.

The spelling of 66389502 in words is "sixty-six million, three hundred eighty-nine thousand, five hundred two".