65249660 has 24 divisors (see below), whose sum is σ = 156599520. Its totient is φ = 22371264.

The previous prime is 65249651. The next prime is 65249741. The reversal of 65249660 is 6694256.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 232895 + ... + 233174.

It is an arithmetic number, because the mean of its divisors is an integer number (6524980).

Almost surely, 2^65249660 is an apocalyptic number.

It is an amenable number.

65249660 is an abundant number, since it is smaller than the sum of its proper divisors (91349860).

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

65249660 is a wasteful number, since it uses less digits than its factorization.

65249660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466085 (or 466083 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 38.

The square root of 65249660 is about 8077.7261652027. The cubic root of 65249660 is about 402.5866948010.

The spelling of 65249660 in words is "sixty-five million, two hundred forty-nine thousand, six hundred sixty".