40197066 has 64 divisors (see below), whose sum is σ = 100251648. Its totient is φ = 10461888.

The previous prime is 40197029. The next prime is 40197107. The reversal of 40197066 is 66079104.

40197066 = 169² + 170² + ... + 500².

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44875 + ... + 45761.

It is an arithmetic number, because the mean of its divisors is an integer number (1566432).

Almost surely, 2^40197066 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40197066, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50125824).

40197066 is an abundant number, since it is smaller than the sum of its proper divisors (60054582).

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

40197066 is a wasteful number, since it uses less digits than its factorization.

40197066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 995.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 40197066 is about 6340.1156140878. The cubic root of 40197066 is about 342.5558997329. Note that the first 3 decimals are identical.

The spelling of 40197066 in words is "forty million, one hundred ninety-seven thousand, sixty-six".