42660407 has 2 divisors, whose sum is σ = 42660408. Its totient is φ = 42660406.

The previous prime is 42660323. The next prime is 42660451. The reversal of 42660407 is 70406624.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42660407 - 2¹⁴ = 42644023 is a prime.

It is a super-4 number, since 4×42660407⁴ (a number of 32 digits) contains 4444 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42660407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42660467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21330203 + 21330204.

It is an arithmetic number, because the mean of its divisors is an integer number (21330204).

Almost surely, 2^42660407 is an apocalyptic number.

42660407 is a deficient number, since it is larger than the sum of its proper divisors (1).

42660407 is an equidigital number, since it uses as much as digits as its factorization.

42660407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 42660407 is about 6531.4934739308. The cubic root of 42660407 is about 349.4150965509.

The spelling of 42660407 in words is "forty-two million, six hundred sixty thousand, four hundred seven".