634518066 has 64 divisors (see below), whose sum is σ = 1629831168. Its totient is φ = 160066368.

The previous prime is 634518041. The next prime is 634518107. The reversal of 634518066 is 660815436.

It is a super-2 number, since 2×634518066² = 805226352160760712, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12706 + ... + 37821.

It is an arithmetic number, because the mean of its divisors is an integer number (25466112).

Almost surely, 2^634518066 is an apocalyptic number.

634518066 is an abundant number, since it is smaller than the sum of its proper divisors (995313102).

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

634518066 is a wasteful number, since it uses less digits than its factorization.

634518066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50575.

The product of its (nonzero) digits is 103680, while the sum is 39.

The square root of 634518066 is about 25189.6420379489. The cubic root of 634518066 is about 859.3063028652.

It can be divided in two parts, 63451 and 8066, that added together give a palindrome (71517).

The spelling of 634518066 in words is "six hundred thirty-four million, five hundred eighteen thousand, sixty-six".