634476066 has 32 divisors (see below), whose sum is σ = 1485606528. Its totient is φ = 176856960.

The previous prime is 634476013. The next prime is 634476071. The reversal of 634476066 is 660674436.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 182505 + ... + 185948.

It is an arithmetic number, because the mean of its divisors is an integer number (46425204).

Almost surely, 2^634476066 is an apocalyptic number.

634476066 is an abundant number, since it is smaller than the sum of its proper divisors (851130462).

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

634476066 is a wasteful number, since it uses less digits than its factorization.

634476066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368506.

The product of its (nonzero) digits is 435456, while the sum is 42.

The square root of 634476066 is about 25188.8083481534. The cubic root of 634476066 is about 859.2873427215.

The spelling of 634476066 in words is "six hundred thirty-four million, four hundred seventy-six thousand, sixty-six".