669276551 has 2 divisors, whose sum is σ = 669276552. Its totient is φ = 669276550.

The previous prime is 669276499. The next prime is 669276583. The reversal of 669276551 is 155672966.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 669276551 - 2¹⁴ = 669260167 is a prime.

It is a super-2 number, since 2×669276551² = 895862203436911202, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 669276496 and 669276505.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (669246551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334638275 + 334638276.

It is an arithmetic number, because the mean of its divisors is an integer number (334638276).

Almost surely, 2^669276551 is an apocalyptic number.

669276551 is a deficient number, since it is larger than the sum of its proper divisors (1).

669276551 is an equidigital number, since it uses as much as digits as its factorization.

669276551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 680400, while the sum is 47.

The square root of 669276551 is about 25870.3798000725. The cubic root of 669276551 is about 874.7189523502.

The spelling of 669276551 in words is "six hundred sixty-nine million, two hundred seventy-six thousand, five hundred fifty-one".