40387066 has 4 divisors (see below), whose sum is σ = 60580602. Its totient is φ = 20193532.

The previous prime is 40387049. The next prime is 40387097. The reversal of 40387066 is 66078304.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 24950025 + 15437041 = 4995^2 + 3929^2 .

It is a super-2 number, since 2×40387066² = 3262230200176712, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10096765 + ... + 10096768.

Almost surely, 2^40387066 is an apocalyptic number.

40387066 is a deficient number, since it is larger than the sum of its proper divisors (20193536).

40387066 is a wasteful number, since it uses less digits than its factorization.

40387066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20193535.

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 40387066 is about 6355.0819034848. The cubic root of 40387066 is about 343.0947727472.

The spelling of 40387066 in words is "forty million, three hundred eighty-seven thousand, sixty-six".