66764534 has 8 divisors (see below), whose sum is σ = 102277728. Its totient is φ = 32671960.

The previous prime is 66764473. The next prime is 66764549. The reversal of 66764534 is 43546766.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 66764491 and 66764500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 355037 + ... + 355224.

It is an arithmetic number, because the mean of its divisors is an integer number (12784716).

Almost surely, 2^66764534 is an apocalyptic number.

66764534 is a deficient number, since it is larger than the sum of its proper divisors (35513194).

66764534 is a wasteful number, since it uses less digits than its factorization.

66764534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 710310.

The product of its digits is 362880, while the sum is 41.

The square root of 66764534 is about 8170.9567371269. The cubic root of 66764534 is about 405.6784523217.

The spelling of 66764534 in words is "sixty-six million, seven hundred sixty-four thousand, five hundred thirty-four".