669421753 has 32 divisors (see below), whose sum is σ = 911215872. Its totient is φ = 474854400.

The previous prime is 669421741. The next prime is 669421757. The reversal of 669421753 is 357124966.

It is a cyclic number.

It is not a de Polignac number, because 669421753 - 2⁹ = 669421241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (669421757) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 68493 + ... + 77653.

It is an arithmetic number, because the mean of its divisors is an integer number (28475496).

Almost surely, 2^669421753 is an apocalyptic number.

It is an amenable number.

669421753 is a deficient number, since it is larger than the sum of its proper divisors (241794119).

669421753 is a wasteful number, since it uses less digits than its factorization.

669421753 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9265.

The product of its digits is 272160, while the sum is 43.

The square root of 669421753 is about 25873.1859847217. The cubic root of 669421753 is about 874.7822056033.

The spelling of 669421753 in words is "six hundred sixty-nine million, four hundred twenty-one thousand, seven hundred fifty-three".