1651666072 has 32 divisors (see below), whose sum is σ = 3560497920. Its totient is φ = 703614240.

The previous prime is 1651666069. The next prime is 1651666097. The reversal of 1651666072 is 2706661561.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78954 + ... + 97657.

It is an arithmetic number, because the mean of its divisors is an integer number (111265560).

Almost surely, 2^1651666072 is an apocalyptic number.

It is an amenable number.

1651666072 is an abundant number, since it is smaller than the sum of its proper divisors (1908831848).

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

1651666072 is a wasteful number, since it uses less digits than its factorization.

1651666072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176791 (or 176787 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 1651666072 is about 40640.6947775256. The cubic root of 1651666072 is about 1182.0633419731.

The spelling of 1651666072 in words is "one billion, six hundred fifty-one million, six hundred sixty-six thousand, seventy-two".