65770720 has 24 divisors (see below), whose sum is σ = 155383704. Its totient is φ = 26308224.

The previous prime is 65770699. The next prime is 65770729. The reversal of 65770720 is 2707756.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65770729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 205374 + ... + 205693.

It is an arithmetic number, because the mean of its divisors is an integer number (6474321).

Almost surely, 2^65770720 is an apocalyptic number.

It is an amenable number.

65770720 is an abundant number, since it is smaller than the sum of its proper divisors (89612984).

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

65770720 is a wasteful number, since it uses less digits than its factorization.

65770720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411082 (or 411074 counting only the distinct ones).

The product of its (nonzero) digits is 20580, while the sum is 34.

The square root of 65770720 is about 8109.9149194058. The cubic root of 65770720 is about 403.6554916869.

The spelling of 65770720 in words is "sixty-five million, seven hundred seventy thousand, seven hundred twenty".