64782783 has 12 divisors (see below), whose sum is σ = 100773400. Its totient is φ = 39866256.

The previous prime is 64782749. The next prime is 64782803. The reversal of 64782783 is 38728746.

It is a happy number.

It is not a de Polignac number, because 64782783 - 2⁶ = 64782719 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64782083) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 276733 + ... + 276966.

Almost surely, 2^64782783 is an apocalyptic number.

64782783 is a deficient number, since it is larger than the sum of its proper divisors (35990617).

64782783 is a wasteful number, since it uses less digits than its factorization.

64782783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553718 (or 553715 counting only the distinct ones).

The product of its digits is 451584, while the sum is 45.

The square root of 64782783 is about 8048.7752484462. The cubic root of 64782783 is about 401.6241939752.

It can be divided in two parts, 6478 and 2783, that added together give a cube (9261 = 21³).

The spelling of 64782783 in words is "sixty-four million, seven hundred eighty-two thousand, seven hundred eighty-three".