64791806 has 4 divisors (see below), whose sum is σ = 97187712. Its totient is φ = 32395902.

The previous prime is 64791791. The next prime is 64791809. The reversal of 64791806 is 60819746.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64791809) by changing a digit.

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 as a sum of consecutive naturals, namely, 16197950 + ... + 16197953.

It is an arithmetic number, because the mean of its divisors is an integer number (24296928).

Almost surely, 2^64791806 is an apocalyptic number.

64791806 is a deficient number, since it is larger than the sum of its proper divisors (32395906).

64791806 is a wasteful number, since it uses less digits than its factorization.

64791806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32395905.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 64791806 is about 8049.3357489920. The cubic root of 64791806 is about 401.6428392937.

The spelling of 64791806 in words is "sixty-four million, seven hundred ninety-one thousand, eight hundred six".