669957001 has 4 divisors (see below), whose sum is σ = 765665152. Its totient is φ = 574248852.

The previous prime is 669956957. The next prime is 669957007. The reversal of 669957001 is 100759966.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 669957001 - 2¹³ = 669948809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (669957007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47854065 + ... + 47854078.

It is an arithmetic number, because the mean of its divisors is an integer number (191416288).

Almost surely, 2^669957001 is an apocalyptic number.

It is an amenable number.

669957001 is a deficient number, since it is larger than the sum of its proper divisors (95708151).

669957001 is an equidigital number, since it uses as much as digits as its factorization.

669957001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95708150.

The product of its (nonzero) digits is 102060, while the sum is 43.

The square root of 669957001 is about 25883.5275996144. The cubic root of 669957001 is about 875.0152926851.

The spelling of 669957001 in words is "six hundred sixty-nine million, nine hundred fifty-seven thousand, one".