669401207460 has 36 divisors (see below), whose sum is σ = 2030516996508. Its totient is φ = 178506988608.

The previous prime is 669401207459. The next prime is 669401207467. The reversal of 669401207460 is 64702104966.

669401207460 is a `hidden beast` number, since 6 + 69 + 4 + 0 + 120 + 7 + 460 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 178011423396 + 491389784064 = 421914^2 + 700992^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (669401207467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1859447619 + ... + 1859447978.

It is an arithmetic number, because the mean of its divisors is an integer number (56403249903).

Almost surely, 2^669401207460 is an apocalyptic number.

669401207460 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

669401207460 is an abundant number, since it is smaller than the sum of its proper divisors (1361115789048).

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

669401207460 is a wasteful number, since it uses less digits than its factorization.

669401207460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3718895612 (or 3718895607 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The spelling of 669401207460 in words is "six hundred sixty-nine billion, four hundred one million, two hundred seven thousand, four hundred sixty".