40661451 has 24 divisors (see below), whose sum is σ = 61523280. Its totient is φ = 25843776.

The previous prime is 40661449. The next prime is 40661459. The reversal of 40661451 is 15416604.

40661451 is a `hidden beast` number, since 40 + 6 + 614 + 5 + 1 = 666.

It is not a de Polignac number, because 40661451 - 2¹ = 40661449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40661459) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20725 + ... + 22601.

It is an arithmetic number, because the mean of its divisors is an integer number (2563470).

Almost surely, 2^40661451 is an apocalyptic number.

40661451 is a deficient number, since it is larger than the sum of its proper divisors (20861829).

40661451 is a wasteful number, since it uses less digits than its factorization.

40661451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1995 (or 1992 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 40661451 is about 6376.6332025607. The cubic root of 40661451 is about 343.8700016953.

The spelling of 40661451 in words is "forty million, six hundred sixty-one thousand, four hundred fifty-one".