721060166 has 16 divisors (see below), whose sum is σ = 1135551744. Its totient is φ = 342735624.

The previous prime is 721060139. The next prime is 721060169. The reversal of 721060166 is 661060127.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (721060169) 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, 40586 + ... + 55581.

It is an arithmetic number, because the mean of its divisors is an integer number (70971984).

Almost surely, 2^721060166 is an apocalyptic number.

721060166 is a deficient number, since it is larger than the sum of its proper divisors (414491578).

721060166 is a wasteful number, since it uses less digits than its factorization.

721060166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96355.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 721060166 is about 26852.5634902890. The cubic root of 721060166 is about 896.7206440299.

It can be divided in two parts, 7210 and 60166, that added together give a palindrome (67376).

The spelling of 721060166 in words is "seven hundred twenty-one million, sixty thousand, one hundred sixty-six".