66390702 has 32 divisors (see below), whose sum is σ = 154021632. Its totient is φ = 18684864.

The previous prime is 66390689. The next prime is 66390703. The reversal of 66390702 is 20709366.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66390703) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8983 + ... + 14610.

It is an arithmetic number, because the mean of its divisors is an integer number (4813176).

Almost surely, 2^66390702 is an apocalyptic number.

66390702 is an abundant number, since it is smaller than the sum of its proper divisors (87630930).

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

66390702 is a wasteful number, since it uses less digits than its factorization.

66390702 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23672.

The product of its (nonzero) digits is 13608, while the sum is 33.

The square root of 66390702 is about 8148.0489689250. The cubic root of 66390702 is about 404.9198683105.

The spelling of 66390702 in words is "sixty-six million, three hundred ninety thousand, seven hundred two".