66770738 has 8 divisors (see below), whose sum is σ = 102287232. Its totient is φ = 32674996.

The previous prime is 66770723. The next prime is 66770777. The reversal of 66770738 is 83707766.

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

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 3 ways as a sum of consecutive naturals, for example, 355070 + ... + 355257.

It is an arithmetic number, because the mean of its divisors is an integer number (12785904).

Almost surely, 2^66770738 is an apocalyptic number.

66770738 is a deficient number, since it is larger than the sum of its proper divisors (35516494).

66770738 is a wasteful number, since it uses less digits than its factorization.

66770738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 710376.

The product of its (nonzero) digits is 296352, while the sum is 44.

The square root of 66770738 is about 8171.3363656136. The cubic root of 66770738 is about 405.6910176315.

The spelling of 66770738 in words is "sixty-six million, seven hundred seventy thousand, seven hundred thirty-eight".