1671066520 has 64 divisors (see below), whose sum is σ = 3955845600. Its totient is φ = 634475520.

The previous prime is 1671066517. The next prime is 1671066547. The reversal of 1671066520 is 256601761.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46911 + ... + 74449.

Almost surely, 2^1671066520 is an apocalyptic number.

1671066520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1671066520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1977922800).

1671066520 is an abundant number, since it is smaller than the sum of its proper divisors (2284779080).

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

1671066520 is a wasteful number, since it uses less digits than its factorization.

1671066520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27628 (or 27624 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 1671066520 is about 40878.6805070809. The cubic root of 1671066520 is about 1186.6735053401.

The spelling of 1671066520 in words is "one billion, six hundred seventy-one million, sixty-six thousand, five hundred twenty".