66761532 has 18 divisors (see below), whose sum is σ = 168758408. Its totient is φ = 22253832.

The previous prime is 66761531. The next prime is 66761537. The reversal of 66761532 is 23516766.

66761532 is a `hidden beast` number, since 6 + 6 + 7 + 615 + 32 = 666.

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

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: 1854487 = 66761532 / (6 + 6 + 7 + 6 + 1 + 5 + 3 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66761531) 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 5 ways as a sum of consecutive naturals, for example, 927208 + ... + 927279.

Almost surely, 2^66761532 is an apocalyptic number.

It is an amenable number.

66761532 is an abundant number, since it is smaller than the sum of its proper divisors (101996876).

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

66761532 is a wasteful number, since it uses less digits than its factorization.

66761532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1854497 (or 1854492 counting only the distinct ones).

The product of its digits is 45360, while the sum is 36.

The square root of 66761532 is about 8170.7730356436. The cubic root of 66761532 is about 405.6723719229.

The spelling of 66761532 in words is "sixty-six million, seven hundred sixty-one thousand, five hundred thirty-two".