66121532 has 6 divisors (see below), whose sum is σ = 115712688. Its totient is φ = 33060764.

The previous prime is 66121529. The next prime is 66121547. The reversal of 66121532 is 23512166.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 8265188 + ... + 8265195.

It is an arithmetic number, because the mean of its divisors is an integer number (19285448).

Almost surely, 2^66121532 is an apocalyptic number.

It is an amenable number.

66121532 is a deficient number, since it is larger than the sum of its proper divisors (49591156).

66121532 is a wasteful number, since it uses less digits than its factorization.

66121532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16530387 (or 16530385 counting only the distinct ones).

The product of its digits is 2160, while the sum is 26.

The square root of 66121532 is about 8131.5147420391. The cubic root of 66121532 is about 404.3719004609.

Adding to 66121532 its reverse (23512166), we get a palindrome (89633698).

The spelling of 66121532 in words is "sixty-six million, one hundred twenty-one thousand, five hundred thirty-two".