1497666517 has 16 divisors (see below), whose sum is σ = 1569677760. Its totient is φ = 1427102208.

The previous prime is 1497666503. The next prime is 1497666553. The reversal of 1497666517 is 7156667941.

It is a cyclic number.

It is not a de Polignac number, because 1497666517 - 2¹⁵ = 1497633749 is a prime.

It is a super-2 number, since 2×1497666517² = 4486009992285822578, which contains 22 as substring.

It is a Duffinian number.

Its product of digits (1905120) is a multiple of the sum of its prime divisors (1620).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1497666557) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1650778 + ... + 1651684.

It is an arithmetic number, because the mean of its divisors is an integer number (98104860).

Almost surely, 2^1497666517 is an apocalyptic number.

It is an amenable number.

1497666517 is a deficient number, since it is larger than the sum of its proper divisors (72011243).

1497666517 is an equidigital number, since it uses as much as digits as its factorization.

1497666517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1620.

The product of its digits is 1905120, while the sum is 52.

The square root of 1497666517 is about 38699.6966008779. The cubic root of 1497666517 is about 1144.1203408725.

The spelling of 1497666517 in words is "one billion, four hundred ninety-seven million, six hundred sixty-six thousand, five hundred seventeen".