65429680 has 20 divisors (see below), whose sum is σ = 152124192. Its totient is φ = 26171840.

The previous prime is 65429669. The next prime is 65429699. The reversal of 65429680 is 8692456.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 408856 + ... + 409015.

Almost surely, 2^65429680 is an apocalyptic number.

It is an amenable number.

65429680 is an abundant number, since it is smaller than the sum of its proper divisors (86694512).

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

65429680 is a wasteful number, since it uses less digits than its factorization.

65429680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 817884 (or 817878 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 65429680 is about 8088.8614773650. The cubic root of 65429680 is about 402.9565925576.

The spelling of 65429680 in words is "sixty-five million, four hundred twenty-nine thousand, six hundred eighty".