669611560 has 32 divisors (see below), whose sum is σ = 1507442400. Its totient is φ = 267699520.

The previous prime is 669611543. The next prime is 669611567. The reversal of 669611560 is 65116966.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (669611567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99915 + ... + 106405.

It is an arithmetic number, because the mean of its divisors is an integer number (47107575).

Almost surely, 2^669611560 is an apocalyptic number.

It is an amenable number.

669611560 is an abundant number, since it is smaller than the sum of its proper divisors (837830840).

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

669611560 is a wasteful number, since it uses less digits than its factorization.

669611560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9081 (or 9077 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 40.

The square root of 669611560 is about 25876.8537500215. The cubic root of 669611560 is about 874.8648760050.

The spelling of 669611560 in words is "six hundred sixty-nine million, six hundred eleven thousand, five hundred sixty".