660667290 has 32 divisors (see below), whose sum is σ = 1592542080. Its totient is φ = 175406784.

The previous prime is 660667279. The next prime is 660667303. The reversal of 660667290 is 92766066.

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, 41214 + ... + 54953.

It is an arithmetic number, because the mean of its divisors is an integer number (49766940).

Almost surely, 2^660667290 is an apocalyptic number.

660667290 is an abundant number, since it is smaller than the sum of its proper divisors (931874790).

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

660667290 is a wasteful number, since it uses less digits than its factorization.

660667290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96406.

The product of its (nonzero) digits is 163296, while the sum is 42.

The square root of 660667290 is about 25703.4489903593. The cubic root of 660667290 is about 870.9520954811.

The spelling of 660667290 in words is "six hundred sixty million, six hundred sixty-seven thousand, two hundred ninety".