66765536 has 12 divisors (see below), whose sum is σ = 131444712. Its totient is φ = 33382752.

The previous prime is 66765533. The next prime is 66765553. The reversal of 66765536 is 63556766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66765533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1043180 + ... + 1043243.

It is an arithmetic number, because the mean of its divisors is an integer number (10953726).

Almost surely, 2^66765536 is an apocalyptic number.

It is an amenable number.

66765536 is a deficient number, since it is larger than the sum of its proper divisors (64679176).

66765536 is a wasteful number, since it uses less digits than its factorization.

66765536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2086433 (or 2086425 counting only the distinct ones).

The product of its digits is 680400, while the sum is 44.

The square root of 66765536 is about 8171.0180516261. The cubic root of 66765536 is about 405.6804817813.

The spelling of 66765536 in words is "sixty-six million, seven hundred sixty-five thousand, five hundred thirty-six".