669786097 has 4 divisors (see below), whose sum is σ = 679219776. Its totient is φ = 660352420.

The previous prime is 669786053. The next prime is 669786107. The reversal of 669786097 is 790687966.

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 a de Polignac number, because none of the positive numbers 2^k-669786097 is a prime.

It is a super-2 number, since 2×669786097² = 897226831468986818, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (669786037) 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, 4716733 + ... + 4716874.

It is an arithmetic number, because the mean of its divisors is an integer number (169804944).

Almost surely, 2^669786097 is an apocalyptic number.

It is an amenable number.

669786097 is a deficient number, since it is larger than the sum of its proper divisors (9433679).

669786097 is an equidigital number, since it uses as much as digits as its factorization.

669786097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9433678.

The product of its (nonzero) digits is 6858432, while the sum is 58.

The square root of 669786097 is about 25880.2259843302. The cubic root of 669786097 is about 874.9408817746.

The spelling of 669786097 in words is "six hundred sixty-nine million, seven hundred eighty-six thousand, ninety-seven".