65991045 has 16 divisors (see below), whose sum is σ = 105707520. Its totient is φ = 35154624.

The previous prime is 65991019. The next prime is 65991053. The reversal of 65991045 is 54019956.

It is not a de Polignac number, because 65991045 - 2⁷ = 65990917 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 65990994 and 65991012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14652 + ... + 18618.

It is an arithmetic number, because the mean of its divisors is an integer number (6606720).

Almost surely, 2^65991045 is an apocalyptic number.

It is an amenable number.

65991045 is a deficient number, since it is larger than the sum of its proper divisors (39716475).

65991045 is a wasteful number, since it uses less digits than its factorization.

65991045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5084.

The product of its (nonzero) digits is 48600, while the sum is 39.

The square root of 65991045 is about 8123.4872437888. The cubic root of 65991045 is about 404.1057238091.

The spelling of 65991045 in words is "sixty-five million, nine hundred ninety-one thousand, forty-five".