66454100 has 36 divisors (see below), whose sum is σ = 144615744. Its totient is φ = 26506080.

The previous prime is 66454097. The next prime is 66454117. The reversal of 66454100 is 145466.

It is a happy number.

It is a super-2 number, since 2×66454100² = 8832294813620000, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66454100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45989 + ... + 47411.

It is an arithmetic number, because the mean of its divisors is an integer number (4017104).

Almost surely, 2^66454100 is an apocalyptic number.

It is an amenable number.

66454100 is an abundant number, since it is smaller than the sum of its proper divisors (78161644).

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

66454100 is a wasteful number, since it uses less digits than its factorization.

66454100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1904 (or 1897 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 66454100 is about 8151.9384197870. The cubic root of 66454100 is about 405.0487163874.

Adding to 66454100 its reverse (145466), we get a palindrome (66599566).

The spelling of 66454100 in words is "sixty-six million, four hundred fifty-four thousand, one hundred".