66710490 has 64 divisors (see below), whose sum is σ = 199618560. Its totient is φ = 13861440.

The previous prime is 66710473. The next prime is 66710551. The reversal of 66710490 is 9401766.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12130 + ... + 16749.

It is an arithmetic number, because the mean of its divisors is an integer number (3119040).

Almost surely, 2^66710490 is an apocalyptic number.

66710490 is an abundant number, since it is smaller than the sum of its proper divisors (132908070).

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

66710490 is a wasteful number, since it uses less digits than its factorization.

66710490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28907.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 66710490 is about 8167.6489885401. The cubic root of 66710490 is about 405.5689610325.

The spelling of 66710490 in words is "sixty-six million, seven hundred ten thousand, four hundred ninety".