667740403 has 8 divisors (see below), whose sum is σ = 751942656. Its totient is φ = 587454600.

The previous prime is 667740379. The next prime is 667740407. The reversal of 667740403 is 304047766.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 667740403 - 2²⁹ = 130869491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (667740407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 978751 + ... + 979432.

It is an arithmetic number, because the mean of its divisors is an integer number (93992832).

Almost surely, 2^667740403 is an apocalyptic number.

667740403 is a deficient number, since it is larger than the sum of its proper divisors (84202253).

667740403 is a wasteful number, since it uses less digits than its factorization.

667740403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1958225.

The product of its (nonzero) digits is 84672, while the sum is 37.

The square root of 667740403 is about 25840.6734238874. The cubic root of 667740403 is about 874.0492107140.

The spelling of 667740403 in words is "six hundred sixty-seven million, seven hundred forty thousand, four hundred three".