669148270 has 64 divisors (see below), whose sum is σ = 1455252480. Its totient is φ = 216407808.

The previous prime is 669148261. The next prime is 669148279. The reversal of 669148270 is 72841966.

It is an interprime number because it is at equal distance from previous prime (669148261) and next prime (669148279).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669148279) 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, 348834 + ... + 350746.

It is an arithmetic number, because the mean of its divisors is an integer number (22738320).

Almost surely, 2^669148270 is an apocalyptic number.

669148270 is an abundant number, since it is smaller than the sum of its proper divisors (786104210).

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

669148270 is a wasteful number, since it uses less digits than its factorization.

669148270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2209.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 669148270 is about 25867.9003786546. The cubic root of 669148270 is about 874.6630626527.

The spelling of 669148270 in words is "six hundred sixty-nine million, one hundred forty-eight thousand, two hundred seventy".