669040951 has 8 divisors (see below), whose sum is σ = 699477120. Its totient is φ = 638717112.

The previous prime is 669040949. The next prime is 669040963. The reversal of 669040951 is 159040966.

669040951 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 669040951 - 2¹ = 669040949 is a prime.

It is a super-2 number, since 2×669040951² = 895231588229968802, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669040451) 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, 15781 + ... + 39838.

It is an arithmetic number, because the mean of its divisors is an integer number (87434640).

Almost surely, 2^669040951 is an apocalyptic number.

669040951 is a deficient number, since it is larger than the sum of its proper divisors (30436169).

669040951 is a wasteful number, since it uses less digits than its factorization.

669040951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56165.

The product of its (nonzero) digits is 58320, while the sum is 40.

The square root of 669040951 is about 25865.8259292063. The cubic root of 669040951 is about 874.6163002294.

The spelling of 669040951 in words is "six hundred sixty-nine million, forty thousand, nine hundred fifty-one".