66904476 has 24 divisors (see below), whose sum is σ = 157148544. Its totient is φ = 22153200.

The previous prime is 66904471. The next prime is 66904477. The reversal of 66904476 is 67440966.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66904471) 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, 16650 + ... + 20273.

It is an arithmetic number, because the mean of its divisors is an integer number (6547856).

Almost surely, 2^66904476 is an apocalyptic number.

It is an amenable number.

66904476 is an abundant number, since it is smaller than the sum of its proper divisors (90244068).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66904476 is a wasteful number, since it uses less digits than its factorization.

66904476 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37081 (or 37079 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 42.

The square root of 66904476 is about 8179.5156335812. The cubic root of 66904476 is about 405.9616956914.

The spelling of 66904476 in words is "sixty-six million, nine hundred four thousand, four hundred seventy-six".