161266770 has 96 divisors (see below), whose sum is σ = 490419072. Its totient is φ = 35997696.

The previous prime is 161266769. The next prime is 161266783. The reversal of 161266770 is 77662161.

161266770 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161266770² = 52013942212465800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 24114 + ... + 30066.

It is an arithmetic number, because the mean of its divisors is an integer number (5108532).

Almost surely, 2^161266770 is an apocalyptic number.

161266770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 161266770, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (245209536).

161266770 is an abundant number, since it is smaller than the sum of its proper divisors (329152302).

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

161266770 is a wasteful number, since it uses less digits than its factorization.

161266770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6016 (or 6013 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 161266770 is about 12699.0854001381. The cubic root of 161266770 is about 544.3124849178.

The spelling of 161266770 in words is "one hundred sixty-one million, two hundred sixty-six thousand, seven hundred seventy".