40997966 has 4 divisors (see below), whose sum is σ = 61496952. Its totient is φ = 20498982.

The previous prime is 40997951. The next prime is 40997969. The reversal of 40997966 is 66979904.

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

It is a super-2 number, since 2×40997966² = 3361666432274312, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40997969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10249490 + ... + 10249493.

It is an arithmetic number, because the mean of its divisors is an integer number (15374238).

Almost surely, 2^40997966 is an apocalyptic number.

40997966 is a deficient number, since it is larger than the sum of its proper divisors (20498986).

40997966 is a wasteful number, since it uses less digits than its factorization.

40997966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20498985.

The product of its (nonzero) digits is 734832, while the sum is 50.

The square root of 40997966 is about 6402.9654067471. The cubic root of 40997966 is about 344.8160217701.

The spelling of 40997966 in words is "forty million, nine hundred ninety-seven thousand, nine hundred sixty-six".