66763407 has 8 divisors (see below), whose sum is σ = 89283376. Its totient is φ = 44376192.

The previous prime is 66763393. The next prime is 66763409. The reversal of 66763407 is 70436766.

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

It is not a de Polignac number, because 66763407 - 2¹⁶ = 66697871 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 (66763409) 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, 32008 + ... + 34029.

It is an arithmetic number, because the mean of its divisors is an integer number (11160422).

Almost surely, 2^66763407 is an apocalyptic number.

66763407 is a deficient number, since it is larger than the sum of its proper divisors (22519969).

66763407 is a wasteful number, since it uses less digits than its factorization.

66763407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66377.

The product of its (nonzero) digits is 127008, while the sum is 39.

The square root of 66763407 is about 8170.8877730636. The cubic root of 66763407 is about 405.6761696617.

The spelling of 66763407 in words is "sixty-six million, seven hundred sixty-three thousand, four hundred seven".