66696903 has 96 divisors (see below), whose sum is σ = 127475712. Its totient is φ = 32659200.

The previous prime is 66696893. The next prime is 66696907. The reversal of 66696903 is 30969666.

It is not a de Polignac number, because 66696903 - 2²⁰ = 65648327 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66696907) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 939358 + ... + 939428.

It is an arithmetic number, because the mean of its divisors is an integer number (1327872).

Almost surely, 2^66696903 is an apocalyptic number.

66696903 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

66696903 is a deficient number, since it is larger than the sum of its proper divisors (60778809).

66696903 is a wasteful number, since it uses less digits than its factorization.

66696903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165 (or 162 counting only the distinct ones).

The product of its (nonzero) digits is 314928, while the sum is 45.

The square root of 66696903 is about 8166.8171890890. The cubic root of 66696903 is about 405.5414249353.

The spelling of 66696903 in words is "sixty-six million, six hundred ninety-six thousand, nine hundred three".