72065650 has 12 divisors (see below), whose sum is σ = 134042202. Its totient is φ = 28826240.

The previous prime is 72065641. The next prime is 72065671. The reversal of 72065650 is 5656027.

It can be written as a sum of positive squares in 3 ways, for example, as 67256401 + 4809249 = 8201^2 + 2193^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 720607 + ... + 720706.

Almost surely, 2^72065650 is an apocalyptic number.

72065650 is a deficient number, since it is larger than the sum of its proper divisors (61976552).

72065650 is a wasteful number, since it uses less digits than its factorization.

72065650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1441325 (or 1441320 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 72065650 is about 8489.1489561675. The cubic root of 72065650 is about 416.1431683320.

The spelling of 72065650 in words is "seventy-two million, sixty-five thousand, six hundred fifty".