65040637 has 8 divisors (see below), whose sum is σ = 67156992. Its totient is φ = 62949600.

The previous prime is 65040631. The next prime is 65040641. The reversal of 65040637 is 73604056.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 65040637 - 2⁷ = 65040509 is a prime.

It is a super-2 number, since 2×65040637² = 8460568922731538, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 65040599 and 65040608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65040631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1039 + ... + 11452.

It is an arithmetic number, because the mean of its divisors is an integer number (8394624).

Almost surely, 2^65040637 is an apocalyptic number.

It is an amenable number.

65040637 is a deficient number, since it is larger than the sum of its proper divisors (2116355).

65040637 is a wasteful number, since it uses less digits than its factorization.

65040637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12659.

The product of its (nonzero) digits is 15120, while the sum is 31.

The square root of 65040637 is about 8064.7775542789. Note that the first 3 decimals coincide. The cubic root of 65040637 is about 402.1563482665.

The spelling of 65040637 in words is "sixty-five million, forty thousand, six hundred thirty-seven".