61658783 has 16 divisors (see below), whose sum is σ = 65802240. Its totient is φ = 57684000.

The previous prime is 61658749. The next prime is 61658869. The reversal of 61658783 is 38785616.

It is a cyclic number.

It is not a de Polignac number, because 61658783 - 2¹⁶ = 61593247 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61658713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 146948 + ... + 147366.

It is an arithmetic number, because the mean of its divisors is an integer number (4112640).

Almost surely, 2^61658783 is an apocalyptic number.

61658783 is a deficient number, since it is larger than the sum of its proper divisors (4143457).

61658783 is a wasteful number, since it uses less digits than its factorization.

61658783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 598.

The product of its digits is 241920, while the sum is 44.

The square root of 61658783 is about 7852.3106790295. The cubic root of 61658783 is about 395.0617496797.

The spelling of 61658783 in words is "sixty-one million, six hundred fifty-eight thousand, seven hundred eighty-three".