66465020 has 24 divisors (see below), whose sum is σ = 139729968. Its totient is φ = 26556800.

The previous prime is 66465011. The next prime is 66465029. The reversal of 66465020 is 2056466.

It is an interprime number because it is at equal distance from previous prime (66465011) and next prime (66465029).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66465029) 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 7 ways as a sum of consecutive naturals, for example, 33455 + ... + 35385.

It is an arithmetic number, because the mean of its divisors is an integer number (5822082).

Almost surely, 2^66465020 is an apocalyptic number.

It is an amenable number.

66465020 is an abundant number, since it is smaller than the sum of its proper divisors (73264948).

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

66465020 is a wasteful number, since it uses less digits than its factorization.

66465020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3661 (or 3659 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 66465020 is about 8152.6081716221. The cubic root of 66465020 is about 405.0709015735.

The spelling of 66465020 in words is "sixty-six million, four hundred sixty-five thousand, twenty".