666737402 has 8 divisors (see below), whose sum is σ = 1000799712. Its totient is φ = 333137500.

The previous prime is 666737389. The next prime is 666737431. The reversal of 666737402 is 204737666.

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

It is a self number, because there is not a number n which added to its sum of digits gives 666737402.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111974 + ... + 117777.

It is an arithmetic number, because the mean of its divisors is an integer number (125099964).

Almost surely, 2^666737402 is an apocalyptic number.

666737402 is a deficient number, since it is larger than the sum of its proper divisors (334062310).

666737402 is a wasteful number, since it uses less digits than its factorization.

666737402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231204.

The product of its (nonzero) digits is 254016, while the sum is 41.

The square root of 666737402 is about 25821.2587222234. The cubic root of 666737402 is about 873.6113601463.

The spelling of 666737402 in words is "six hundred sixty-six million, seven hundred thirty-seven thousand, four hundred two".