1661766652 has 48 divisors (see below), whose sum is σ = 3734825472. Its totient is φ = 628816320.

The previous prime is 1661766647. The next prime is 1661766713. The reversal of 1661766652 is 2566671661.

It is a super-2 number, since 2×1661766652² = 5522936811398578208, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (46).

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, 90874 + ... + 107617.

It is an arithmetic number, because the mean of its divisors is an integer number (77808864).

Almost surely, 2^1661766652 is an apocalyptic number.

It is an amenable number.

1661766652 is an abundant number, since it is smaller than the sum of its proper divisors (2073058820).

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

1661766652 is a wasteful number, since it uses less digits than its factorization.

1661766652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198538 (or 198536 counting only the distinct ones).

The product of its digits is 544320, while the sum is 46.

The square root of 1661766652 is about 40764.7721936478. The cubic root of 1661766652 is about 1184.4680389889.

The spelling of 1661766652 in words is "one billion, six hundred sixty-one million, seven hundred sixty-six thousand, six hundred fifty-two".