64672726 has 32 divisors (see below), whose sum is σ = 107425440. Its totient is φ = 29062656.

The previous prime is 64672717. The next prime is 64672733. The reversal of 64672726 is 62727646.

64672726 = 1101² + 1102² + ... + 1151².

It is a happy number.

It is a super-2 number, since 2×64672726² = 8365122976542152, which contains 22 as substring.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 105196 + ... + 105808.

It is an arithmetic number, because the mean of its divisors is an integer number (3357045).

Almost surely, 2^64672726 is an apocalyptic number.

64672726 is a deficient number, since it is larger than the sum of its proper divisors (42752714).

64672726 is a wasteful number, since it uses less digits than its factorization.

64672726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 768.

The product of its digits is 169344, while the sum is 40.

The square root of 64672726 is about 8041.9354635560. The cubic root of 64672726 is about 401.3966303834.

The spelling of 64672726 in words is "sixty-four million, six hundred seventy-two thousand, seven hundred twenty-six".