669456057030 has 16 divisors (see below), whose sum is σ = 1606694536944. Its totient is φ = 178521615200.

The previous prime is 669456056993. The next prime is 669456057031. The reversal of 669456057030 is 30750654966.

It is a happy number.

It is a super-2 number, since 2×669456057030² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669456057031) 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, 11157600921 + ... + 11157600980.

It is an arithmetic number, because the mean of its divisors is an integer number (100418408559).

Almost surely, 2^669456057030 is an apocalyptic number.

669456057030 is an abundant number, since it is smaller than the sum of its proper divisors (937238479914).

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

669456057030 is a wasteful number, since it uses less digits than its factorization.

669456057030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22315201911.

The product of its (nonzero) digits is 4082400, while the sum is 51.

The spelling of 669456057030 in words is "six hundred sixty-nine billion, four hundred fifty-six million, fifty-seven thousand, thirty".