66536738 has 8 divisors (see below), whose sum is σ = 102126288. Its totient is φ = 32494644.

The previous prime is 66536737. The next prime is 66536747. The reversal of 66536738 is 83763566.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66536737) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 386756 + ... + 386927.

It is an arithmetic number, because the mean of its divisors is an integer number (12765786).

Almost surely, 2^66536738 is an apocalyptic number.

66536738 is a deficient number, since it is larger than the sum of its proper divisors (35589550).

66536738 is a wasteful number, since it uses less digits than its factorization.

66536738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 773728.

The product of its digits is 544320, while the sum is 44.

The square root of 66536738 is about 8157.0054554352. The cubic root of 66536738 is about 405.2165442601.

The spelling of 66536738 in words is "sixty-six million, five hundred thirty-six thousand, seven hundred thirty-eight".