66329790 has 16 divisors (see below), whose sum is σ = 159191568. Its totient is φ = 17687936.

The previous prime is 66329777. The next prime is 66329797. The reversal of 66329790 is 9792366.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66329797) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1105467 + ... + 1105526.

It is an arithmetic number, because the mean of its divisors is an integer number (9949473).

Almost surely, 2^66329790 is an apocalyptic number.

66329790 is an abundant number, since it is smaller than the sum of its proper divisors (92861778).

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

66329790 is a wasteful number, since it uses less digits than its factorization.

66329790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2211003.

The product of its (nonzero) digits is 122472, while the sum is 42.

The square root of 66329790 is about 8144.3102838730. The cubic root of 66329790 is about 404.7959954128.

The spelling of 66329790 in words is "sixty-six million, three hundred twenty-nine thousand, seven hundred ninety".