669405753 has 24 divisors (see below), whose sum is σ = 1059107400. Its totient is φ = 405533184.

The previous prime is 669405749. The next prime is 669405761. The reversal of 669405753 is 357504966.

It can be written as a sum of positive squares in 4 ways, for example, as 62916624 + 606489129 = 7932^2 + 24627^2 .

It is not a de Polignac number, because 669405753 - 2² = 669405749 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 669405699 and 669405708.

It is not an unprimeable number, because it can be changed into a prime (669405743) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 70998 + ... + 79871.

It is an arithmetic number, because the mean of its divisors is an integer number (44129475).

Almost surely, 2^669405753 is an apocalyptic number.

It is an amenable number.

669405753 is a deficient number, since it is larger than the sum of its proper divisors (389701647).

669405753 is a wasteful number, since it uses less digits than its factorization.

669405753 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150921 (or 150918 counting only the distinct ones).

The product of its (nonzero) digits is 680400, while the sum is 45.

The square root of 669405753 is about 25872.8767824531. The cubic root of 669405753 is about 874.7752360923.

The spelling of 669405753 in words is "six hundred sixty-nine million, four hundred five thousand, seven hundred fifty-three".