66511532 has 6 divisors (see below), whose sum is σ = 116395188. Its totient is φ = 33255764.

The previous prime is 66511519. The next prime is 66511537. The reversal of 66511532 is 23511566.

It is a junction number, because it is equal to n+sod(n) for n = 66511495 and 66511504.

It is not an unprimeable number, because it can be changed into a prime (66511537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8313938 + ... + 8313945.

It is an arithmetic number, because the mean of its divisors is an integer number (19399198).

Almost surely, 2^66511532 is an apocalyptic number.

It is an amenable number.

66511532 is a deficient number, since it is larger than the sum of its proper divisors (49883656).

66511532 is a wasteful number, since it uses less digits than its factorization.

66511532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16627887 (or 16627885 counting only the distinct ones).

The product of its digits is 5400, while the sum is 29.

The square root of 66511532 is about 8155.4602567850. The cubic root of 66511532 is about 405.1653686311.

The spelling of 66511532 in words is "sixty-six million, five hundred eleven thousand, five hundred thirty-two".