66954531 has 12 divisors (see below), whose sum is σ = 103848072. Its totient is φ = 38259648.

The previous prime is 66954509. The next prime is 66954553. The reversal of 66954531 is 13545966.

It is an interprime number because it is at equal distance from previous prime (66954509) and next prime (66954553).

It is not a de Polignac number, because 66954531 - 2¹⁰ = 66953507 is a prime.

It is a super-2 number, since 2×66954531² = 8965818442859922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66954531.

It is not an unprimeable number, because it can be changed into a prime (66954581) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 227590 + ... + 227883.

It is an arithmetic number, because the mean of its divisors is an integer number (8654006).

Almost surely, 2^66954531 is an apocalyptic number.

66954531 is a deficient number, since it is larger than the sum of its proper divisors (36893541).

66954531 is a wasteful number, since it uses less digits than its factorization.

66954531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455490 (or 455483 counting only the distinct ones).

The product of its digits is 97200, while the sum is 39.

The square root of 66954531 is about 8182.5748392545. The cubic root of 66954531 is about 406.0629113768.

The spelling of 66954531 in words is "sixty-six million, nine hundred fifty-four thousand, five hundred thirty-one".