66631470 has 32 divisors (see below), whose sum is σ = 160272000. Its totient is φ = 17728800.

The previous prime is 66631463. The next prime is 66631471. The reversal of 66631470 is 7413666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66631471) 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 in 15 ways as a sum of consecutive naturals, for example, 12745 + ... + 17195.

It is an arithmetic number, because the mean of its divisors is an integer number (5008500).

Almost surely, 2^66631470 is an apocalyptic number.

66631470 is an abundant number, since it is smaller than the sum of its proper divisors (93640530).

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

66631470 is a wasteful number, since it uses less digits than its factorization.

66631470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4960.

The product of its (nonzero) digits is 18144, while the sum is 33.

The square root of 66631470 is about 8162.8101778738. The cubic root of 66631470 is about 405.4087627314.

The spelling of 66631470 in words is "sixty-six million, six hundred thirty-one thousand, four hundred seventy".