65066780 has 24 divisors (see below), whose sum is σ = 137643408. Its totient is φ = 25835648.

The previous prime is 65066759. The next prime is 65066789. The reversal of 65066780 is 8766056.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65066789) 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, 9134 + ... + 14613.

It is an arithmetic number, because the mean of its divisors is an integer number (5735142).

Almost surely, 2^65066780 is an apocalyptic number.

It is an amenable number.

65066780 is an abundant number, since it is smaller than the sum of its proper divisors (72576628).

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

65066780 is a wasteful number, since it uses less digits than its factorization.

65066780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23893 (or 23891 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 65066780 is about 8066.3982048991. The cubic root of 65066780 is about 402.2102231237.

The spelling of 65066780 in words is "sixty-five million, sixty-six thousand, seven hundred eighty".