1065661572 has 24 divisors (see below), whose sum is σ = 2506126336. Its totient is φ = 352423008.

The previous prime is 1065661547. The next prime is 1065661577. The reversal of 1065661572 is 2751665601.

It is a super-2 number, since 2×1065661572² = 2271269172075022368, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1065661572.

It is not an unprimeable number, because it can be changed into a prime (1065661577) 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, 348103 + ... + 351150.

Almost surely, 2^1065661572 is an apocalyptic number.

1065661572 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1065661572 is an abundant number, since it is smaller than the sum of its proper divisors (1440464764).

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

1065661572 is a wasteful number, since it uses less digits than its factorization.

1065661572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 699387 (or 699385 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 39.

The square root of 1065661572 is about 32644.4723038986. The cubic root of 1065661572 is about 1021.4248867047.

The spelling of 1065661572 in words is "one billion, sixty-five million, six hundred sixty-one thousand, five hundred seventy-two".