66883757 has 4 divisors (see below), whose sum is σ = 68017440. Its totient is φ = 65750076.

The previous prime is 66883723. The next prime is 66883777. The reversal of 66883757 is 75738866.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66883757 - 2⁶ = 66883693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66883717) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 566753 + ... + 566870.

It is an arithmetic number, because the mean of its divisors is an integer number (17004360).

Almost surely, 2^66883757 is an apocalyptic number.

It is an amenable number.

66883757 is a deficient number, since it is larger than the sum of its proper divisors (1133683).

66883757 is a wasteful number, since it uses less digits than its factorization.

66883757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1133682.

The product of its digits is 1693440, while the sum is 50.

The square root of 66883757 is about 8178.2490179744. The cubic root of 66883757 is about 405.9197852480.

The spelling of 66883757 in words is "sixty-six million, eight hundred eighty-three thousand, seven hundred fifty-seven".