1066515420 has 48 divisors (see below), whose sum is σ = 2990621088. Its totient is φ = 283987200.

The previous prime is 1066515419. The next prime is 1066515421. The reversal of 1066515420 is 245156601.

It is an interprime number because it is at equal distance from previous prime (1066515419) and next prime (1066515421).

It is a super-2 number, since 2×1066515420² = 2274910282195552800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1066515421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29382 + ... + 54738.

It is an arithmetic number, because the mean of its divisors is an integer number (62304606).

Almost surely, 2^1066515420 is an apocalyptic number.

1066515420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1066515420 is an abundant number, since it is smaller than the sum of its proper divisors (1924105668).

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

1066515420 is a wasteful number, since it uses less digits than its factorization.

1066515420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26070 (or 26068 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 1066515420 is about 32657.5476727816. The cubic root of 1066515420 is about 1021.6976151807.

The spelling of 1066515420 in words is "one billion, sixty-six million, five hundred fifteen thousand, four hundred twenty".