66726460 has 12 divisors (see below), whose sum is σ = 140125608. Its totient is φ = 26690576.

The previous prime is 66726449. The next prime is 66726487. The reversal of 66726460 is 6462766.

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, 1668142 + ... + 1668181.

It is an arithmetic number, because the mean of its divisors is an integer number (11677134).

Almost surely, 2^66726460 is an apocalyptic number.

It is an amenable number.

66726460 is an abundant number, since it is smaller than the sum of its proper divisors (73399148).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66726460 is a wasteful number, since it uses less digits than its factorization.

66726460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3336332 (or 3336330 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 37.

The square root of 66726460 is about 8168.6265675449. The cubic root of 66726460 is about 405.6013218578.

The spelling of 66726460 in words is "sixty-six million, seven hundred twenty-six thousand, four hundred sixty".