669265971 has 32 divisors (see below), whose sum is σ = 990809088. Its totient is φ = 398442240.

The previous prime is 669265967. The next prime is 669265981. The reversal of 669265971 is 179562966.

It is not a de Polignac number, because 669265971 - 2² = 669265967 is a prime.

It is not an unprimeable number, because it can be changed into a prime (669265901) 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, 883725 + ... + 884481.

It is an arithmetic number, because the mean of its divisors is an integer number (30962784).

Almost surely, 2^669265971 is an apocalyptic number.

669265971 is a deficient number, since it is larger than the sum of its proper divisors (321543117).

669265971 is a wasteful number, since it uses less digits than its factorization.

669265971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1211.

The product of its digits is 1224720, while the sum is 51.

The square root of 669265971 is about 25870.1753183081. The cubic root of 669265971 is about 874.7143431069.

The spelling of 669265971 in words is "six hundred sixty-nine million, two hundred sixty-five thousand, nine hundred seventy-one".