166607620 has 24 divisors (see below), whose sum is σ = 356479704. Its totient is φ = 65385216.

The previous prime is 166607611. The next prime is 166607629. The reversal of 166607620 is 26706661.

166607620 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (166607611) and next prime (166607629).

It can be written as a sum of positive squares in 4 ways, for example, as 82555396 + 84052224 = 9086^2 + 9168^2 .

It is not an unprimeable number, because it can be changed into a prime (166607629) 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, 77529 + ... + 79648.

It is an arithmetic number, because the mean of its divisors is an integer number (14853321).

Almost surely, 2^166607620 is an apocalyptic number.

166607620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166607620 is an abundant number, since it is smaller than the sum of its proper divisors (189872084).

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

166607620 is a wasteful number, since it uses less digits than its factorization.

166607620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157239 (or 157237 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 166607620 is about 12907.6574172078. The cubic root of 166607620 is about 550.2562112069.

The spelling of 166607620 in words is "one hundred sixty-six million, six hundred seven thousand, six hundred twenty".