66763964 has 12 divisors (see below), whose sum is σ = 123709824. Its totient is φ = 31418304.

The previous prime is 66763937. The next prime is 66763969. The reversal of 66763964 is 46936766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66763969) 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, 490844 + ... + 490979.

It is an arithmetic number, because the mean of its divisors is an integer number (10309152).

Almost surely, 2^66763964 is an apocalyptic number.

It is an amenable number.

66763964 is a deficient number, since it is larger than the sum of its proper divisors (56945860).

66763964 is a wasteful number, since it uses less digits than its factorization.

66763964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 981844 (or 981842 counting only the distinct ones).

The product of its digits is 979776, while the sum is 47.

The square root of 66763964 is about 8170.9218574161. The cubic root of 66763964 is about 405.6772978296.

The spelling of 66763964 in words is "sixty-six million, seven hundred sixty-three thousand, nine hundred sixty-four".