66201534 has 24 divisors (see below), whose sum is σ = 163927920. Its totient is φ = 18914688.

The previous prime is 66201479. The next prime is 66201557. The reversal of 66201534 is 43510266.

66201534 is a `hidden beast` number, since 6 + 620 + 1 + 5 + 34 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 66201498 and 66201507.

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 in 11 ways as a sum of consecutive naturals, for example, 262579 + ... + 262830.

It is an arithmetic number, because the mean of its divisors is an integer number (6830330).

Almost surely, 2^66201534 is an apocalyptic number.

66201534 is an abundant number, since it is smaller than the sum of its proper divisors (97726386).

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

66201534 is a wasteful number, since it uses less digits than its factorization.

66201534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525424 (or 525421 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 66201534 is about 8136.4325106277. The cubic root of 66201534 is about 404.5349210955.

The spelling of 66201534 in words is "sixty-six million, two hundred one thousand, five hundred thirty-four".