65201780 has 48 divisors (see below), whose sum is σ = 163296000. Its totient is φ = 21381888.

The previous prime is 65201771. The next prime is 65201789. The reversal of 65201780 is 8710256.

It is an interprime number because it is at equal distance from previous prime (65201771) and next prime (65201789).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65201789) 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, 6905 + ... + 13344.

It is an arithmetic number, because the mean of its divisors is an integer number (3402000).

Almost surely, 2^65201780 is an apocalyptic number.

It is an amenable number.

65201780 is an abundant number, since it is smaller than the sum of its proper divisors (98094220).

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

65201780 is a wasteful number, since it uses less digits than its factorization.

65201780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20288 (or 20286 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 65201780 is about 8074.7619159948. The cubic root of 65201780 is about 402.4881984117.

The spelling of 65201780 in words is "sixty-five million, two hundred one thousand, seven hundred eighty".