40066971 has 16 divisors (see below), whose sum is σ = 61146624. Its totient is φ = 22860864.

The previous prime is 40066969. The next prime is 40066981. The reversal of 40066971 is 17966004.

It is a happy number.

It is not a de Polignac number, because 40066971 - 2¹ = 40066969 is a prime.

It is a super-2 number, since 2×40066971² = 3210724330229682, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40066921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20770 + ... + 22616.

It is an arithmetic number, because the mean of its divisors is an integer number (3821664).

Almost surely, 2^40066971 is an apocalyptic number.

40066971 is a deficient number, since it is larger than the sum of its proper divisors (21079653).

40066971 is a wasteful number, since it uses less digits than its factorization.

40066971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2890.

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

The square root of 40066971 is about 6329.8476284979. The cubic root of 40066971 is about 342.1859475795.

The spelling of 40066971 in words is "forty million, sixty-six thousand, nine hundred seventy-one".